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Transcript of 1 © 2005 Cisco Systems, Inc. All rights reserved. Cisco Public IP Telephony Voice Dial Plans,...
![Page 1: 1 © 2005 Cisco Systems, Inc. All rights reserved. Cisco Public IP Telephony Voice Dial Plans, Configuring Voice Interfaces and Dial Peers Cisco Networking.](https://reader030.fdocuments.net/reader030/viewer/2022013011/551c3675550346a3488b45de/html5/thumbnails/1.jpg)
1© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Voice Dial Plans, Configuring Voice Interfaces and Dial Peers
Cisco Networking Academy Program
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2© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Call Establishment Principles
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3© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Dial-Peer Call Legs
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4© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
End-to-End Calls
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5© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Configuring Dial Peers
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6© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Understanding Dial Peers
• A dial peer is an addressable call endpoint.
• Dial peers establish logical connections, called call legs, to complete an end-to-end call.
• Cisco voice-enabled routers support two types of dial peers:
POTS dial peers: Connect to a traditional telephony network
VoIP dial peers: Connect over a packet network
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7© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Dial Peer
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8© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
POTS Dial Peers
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9© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Practice Item 1: POTS Dial-Peer Configuration
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10© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
VoIP Dial Peers
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11© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Practice Item 2:VoIP Dial-Peer Configuration
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12© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Common Destination-Pattern Options
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13© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Default Dial Peer 0
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14© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Matching Inbound Dial Peers
• incoming called-number
Defines the called number or DNIS string
• answer-address
Defines the originating calling number or ANI string
• destination-pattern
Uses the calling number (originating or ANI string) to match the incoming call leg to an inbound dial peer
• port
Attempts to match the configured dial-peer port to the voice port associated with the incoming call (POTS dial peers only)
Configurable parameters used for matching inbound dial peers:
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15© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Practice Item 3:Matching Inbound Dial Peers
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16© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Matching Outbound Dial Peers
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17© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Hunt-Group Commands
• preference—dial-peer command
Specifies which dial peers in a hunt group will be used first
Options are 0 through 9 with 0 being most preferred
• huntstop—dial-peer command
Stops dial-peer hunting on the dial peer if it is not matched
• dial-peer hunt—global command
Specifies the global hunt-selection order for all hunt groups
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18© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Hunt-Group Configuration
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19© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Practice Item 4:Configuring Hunt Groups
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20© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digit Consumption and Forwarding
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21© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digit Collection
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22© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digit Manipulation Commands
• prefix
Dial-peer command
Adds digits to the front of the dial string before it is forwarded to the telephony interface
• forward-digits
Dial-peer command
Controls the number of digits forwarded to the telephony interface
• num-exp
Global command
Expands an extension into a full telephone number or replaces one number with another
• translation-rule
Global and dial-peer command
Digit translation rules used to manipulate the calling number digits, or ANI, or the called number digits, or DNIS, for a voice call
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23© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Practice Item 5:Digit Manipulation
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24© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Special-Purpose Connections
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25© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Special-Purpose Connection Commands
• connection plar
Associates a voice port directly with a dial peer
• connection plar-opx
Extends a PBX connection to a remote location
• connection trunk
Emulates a permanent trunk connection to a PBX
• connection tie-line
Emulates a temporary tie-line trunk to a PBX
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26© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
PLAR Connection
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27© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
PLAR-OPX Connection
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28© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Trunk Connection
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29© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Tie-Line Connection
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30© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Building a Scalable Numbering Plan
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31© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Dial plans contain specific dialing patterns for a user who wants to reach a particular telephone number.
Dial Plans
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32© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Need for a Scalable Numbering Plan
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33© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Attributes of a Scalable Numbering Plan
• Logic distribution
• Hierarchical design
• Simplicity in provisioning
• Reduction in postdial delay
• Availability and fault tolerance
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34© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Hierarchical Numbering Plans
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35© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Challenges Associated with Integration
• Varying number lengths
• Specialized services
• Voice mail
• Necessity of prefixes or area codes
• International dialing consideration
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36© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Integrating Internal and PublicNumbering Plans
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37© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Number Normalization
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38© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Configuring Voice Ports
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39© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Local Calls
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40© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
On-Net Calls
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41© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Off-Net Calls
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42© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
PLAR
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43© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
PBX-to-PBX Calls
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44© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Cisco CallManager-to-Cisco CallManager
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45© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
On-Net to Off-Net Call
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46© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXS Voice Port Configuration
• signal
• cptone
• description
• ring frequency
• ring cadence
• disconnect-ack
• busyout
• station id name
• station id number
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47© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXS Voice Port Configuration
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48© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXO Voice Port Configuration
• signal
• ring number
• dial-type
• description
• supervisory disconnect
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49© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXO Voice Port Configuration
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50© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
E&M Voice Port Configuration
• signal
• operation
• type
• auto-cut-through
• description
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51© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
E&M Voice Port Configuration
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52© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Timers and Timing Configuration
• timeouts initial
• timeouts interdigit
• timeouts ringing
• timing digit
• timing interdigit
• timing hookflash-in/hookflash-out
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53© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Timers and Timing Configuration
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54© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Basic T1/E1 Controller Configuration
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55© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
T1/E1 Digital-Voice Configuration
• Create digital voice ports with the ds0-group command
ds0-group-no
timeslot-list
signal-type
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56© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digital-Voice Configuration
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57© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN Configuration
• Global configuration
isdn switch-type
• T1/E1 controller configuration
pri-group
• D channel configuration
isdn incoming-voice configuration
• QSIG configuration
QSIG signaling
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58© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN Configuration
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59© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
CCS Options
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60© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Verifying and Troubleshooting Voice Ports
1. Check for dial tone (FXS only).
2. Check for DTMF tones (FXS only).
3. Use show voice port to check configuration.
4. Use show voice port to ensure port is enabled.
5. Be sure PBX configuration is compatible with voice port.
6. Check physical installation of hardware.
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61© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Commands to Verify Voice Ports
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62© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Test Commands
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63© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN Commands
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64© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Adjusting Voice Quality
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65© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Factors That Affect Voice Quality
• Transmit and receive power levels
• Input gain
• Output attenuation
The following factors affect voice quality:
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66© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Calculating Decibel Levels
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67© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Configuring Voice Port Voice-Quality Tuning
• input-gain
• output-attenuation
• impedance
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68© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Configuration Examples
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69© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Echo Cancellation
• Echo cancellation is configured at the voice port level.
• Echo cancellation is enabled by default.
• Echo cancellation coverage adjusts the size of the echo canceller.
• Nonlinear echo cancellation shuts off any signal if near-end speech is detected.
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70© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Analog and Digital Voice Interfaces
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71© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Local-Loop Connections
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72© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Analog Voice Interface: FXS
• Connects directly to analog phones or faxes
• Used to provision local service
• Provides power, call progress tones, and dial tone
Foreign exchange station interface
FXS
FXS
FXS
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73© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Analog Voice Interface: FXO
PSTNFXO FXO
• Connects directly to office equipment
• Used to make and receive calls from the PSTN
• Can be used to connect through the PSTN to another site
• Answer inbound calls arriving
Foreign exchange office interface
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74© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Analog Voice Interface: E&M
E&M E&MTie Line
E&MMOH
• E&M interface
• Connects two sites together with a leased connection
• Allows for the use of non PSTN numbers
• Used to create tie-lines
• Commonly used to connect to external Music on Hold sources
E&M interface
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75© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Channel Associated Signaling Systems
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76© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Channel Associated Signaling Systems: T1
CAS T1
PSTN
• Up to 24 Channels for voice
• Each channel is a DS0
• 8000 samples per second
• 1 byte per sample
• Partial T1 may be available
• Signaling travels in-band
CAS T1’s have the following characteristics
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77© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Channel Associated Signaling Systems: E1
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78© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Channel Associated Signaling Systems: E1
CAS E1
PSTN
• Up to 30 Channels for voice
• Each channel is a DS0
• 8000 samples per second
• 1 byte per sample
• Partial E1 my be available
• Signaling is carried out of band
CAS E1’s have the following characteristics
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79© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Common-Channel Signaling
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80© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN PRI/BRI
PRI/BRI
PRI 23B+D
BRI 2B +D
Carrier
Carrier
• Allows for a multiple services through one connection
• Well adapted for voice
64kbps channels
Q.931 on the D channel
• Supports standards based functions
• Supports proprietary implementations
• International Utilization
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81© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Configuring Analog and Digital Voice Interfaces
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82© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXS Voice Port Configuration
• signal
• cptone
• description
• ring frequency
• ring cadence
• disconnect-ack
• busyout
• station id name
• station id number
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83© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXS Voice Port Configuration
CMERouter(config)#voice-port 1/0/0
CMERouter(config-voiceport)#signal loop-start
CMERouter(config-voiceport)#cptone GB
CMERouter(config-voiceport)#ring cadence pattern01
CMERouter(config)#voice-port 1/0/1
CMERouter(config-voiceport)#signal loop-start
CMERouter(config-voiceport)#cptone GB
CMERouter(config-voiceport)#ring cadence pattern02
FXS Port 1/0/0
FXS Port 1/0/1
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84© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXO Voice Port Configuration
• signal
• ring number
• dial-type
• description
• supervisory disconnect
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85© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXO Voice Port Configuration
CMERouter(config)#voice-port 1/1/0
CMERouter(config-voiceport)#signal ground-start
CMERouter(config-voiceport)#ring number 3
CMERouter(config-voiceport)#dial-type dtmf
CMERouter(config-voiceport)#description Connection_to_PSTN
FX0 Port 1/1/0
PSTN
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86© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
E&M Voice Port Configuration
• signal
• operation
• type
• auto-cut-through
• description
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87© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXS Voice Port Configuration
CMERouter(config)#voice-port 1/1/0
CMERouter(config-voiceport)#signal immediate
CMERouter(config-voiceport)#auto-cut-through
CMERouter(config-voiceport)#operation 4-wire
CMERouter(config-voiceport)#type 1
CMERouter(config-voiceport)#description MoH_Device
E&M Port 1/1/0
MOH
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88© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
BRI Reference Points
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89© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN Configuration Tasks
PSTNISDN PRI or BRI
• Select the ISDN switch type either globally or on an interface
• The interface setting will override the global setting
• Configure the interface or controller settings
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90© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN BRI Configuration Commands
isdn switch-type switch-typeisdn switch-type switch-type
CMERouter(config)#
• Sets the ISDN switch type globally
isdn switch-type switch-typeisdn switch-type switch-type
CMERouter(config-if)#
• Sets the ISDN switch type on an interface (overrides the global setting if it exists)
interface BRI mod/portinterface BRI mod/port
CMERouter(config)#
• Defines a SPID if assigned by the carrier (found in North America)
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91© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN BRI Configuration Commands
isdn spid1 spid-number [ldn]isdn spid1 spid-number [ldn]
CMERouter(config-int)#
• Defines SPID 1 if assigned by the carrier (found in North America)
isdn spid2 spid-number [ldn] isdn spid2 spid-number [ldn]
CMERouter(config-int)#
• Defines SPID 2 if assigned by the carrier (found in North America)
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92© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN Configuration Tasks
ISDNBRI 0/1
CMERouter(config)#isdn switch-type basic-5ess
CMERouter(config)#interface bri 0/1
CMERouter(config-int)#isdn spid1 20655512340001
CMERouter(config-int)#isdn spid2 20655512340002
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93© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Timers and Timing Configuration
• timeouts initial
• timeouts interdigit
• timeouts ringing
• timing digit
• timing interdigit
• timing hookflash-in/hookflash-out
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94© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
FXS Voice Port Configuration
CMERouter(config)#voice-port 1/0/0
CMERouter(config-voiceport)#signal loop-start
CMERouter(config-voiceport)#cptone GB
CMERouter(config-voiceport)#ring cadence pattern01
CMERouter(config-voiceport)#timeouts initial 15
CMERouter(config-voiceport)#timeouts interdigit 15
CMERouter(config-voiceport)#timeouts ringing 120
CMERouter(config-voiceport)#timing hookflash-in 500
FXS Port 1/0/0
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95© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Basic T1/E1 Controller Configuration
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96© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
linecode {ami | b8zs}linecode {ami | b8zs}
CMERouter(config-control)#
• Configures the linecode for a T1 line
linecode {ami | hdb3}linecode {ami | hdb3}
CMERouter(config-control)#
• Configures the linecode for a E1 line
Basic T1/E1 Controller Configuration
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97© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
framing {sf | esf}framing {sf | esf}
CMERouter(config-control)#
• Configures the framing for a T1 line
framing {crc4 | no-crc4 | australia}framing {crc4 | no-crc4 | australia}
CMERouter(config-control)#
• Configures the framing for a E1 line
Basic T1/E1 Controller Configuration
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98© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ds0-group ds0-group-no timeslots timeslot-list type {e&m-delay-dial | e&m-fgd | e&m-immediate-start | e&m-wink-start | ext-sig | fgd-eana | fxo-ground-start | fxo-loop-start | fxs-ground-start | fxs-loop-start}
ds0-group ds0-group-no timeslots timeslot-list type {e&m-delay-dial | e&m-fgd | e&m-immediate-start | e&m-wink-start | ext-sig | fgd-eana | fxo-ground-start | fxo-loop-start | fxs-ground-start | fxs-loop-start}
CMERouter(config-control)#
• Creates the voice ports of the T1 or E1 and the signaling that is used
Basic T1/E1 Controller Configuration
clock source {line | internal}clock source {line | internal}
CMERouter(config-control)#
• Sets the source of the clocking
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99© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Basic T1/E1 Controller Configuration
CMERouter(config)#controller T1 1/0
CMERouter(config-controller)#linecode b8zs
CMERouter(config-controller)#framing esf
CMERouter(config-controller)#ds0-group 1 timeslots 1-24 type fxo-groundstart
CMERouter(config-controller)#clock source line
CMERouter(config)#controller E1 1/0
CMERouter(config-controller)#linecode hdb3
CMERouter(config-controller)#framing crc4
CMERouter(config-controller)#ds0-group 1 timeslots 1-15 type e&m-wink-start
CMERouter(config-controller)#clock source line
T1 1/0PSTN
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100© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
PRI Reference Points
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101© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN PRI Configuration Commands
isdn switch-type switch-typeisdn switch-type switch-type
CMERouter(config)#
• Sets the ISDN switch type globally
isdn switch-type switch-typeisdn switch-type switch-type
CMERouter(config-controller)#
• Sets the ISDN switch type on an interface (overrides the global setting if it exists)
controller {t1 | e1} {slot/port | unit-number}controller {t1 | e1} {slot/port | unit-number}
CMERouter(config)#
• Defines a SPID if assigned by the carrier (found in North America)
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102© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN PRI Configuration Commands
pri-group timeslots rangepri-group timeslots range
CMERouter(config-controller)#
• Sets the PRI group with a range of timeslots
interface serial slot/port:timeslotinterface serial slot/port:timeslot
CMERouter(config-int)#
• Sets the PRI D channel
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103© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ISDN Configuration Tasks
ISDNPRI 0/1
CMERouter(config)#isdn switch-type primary-ni
CMERouter(config)#controller t1 0/1
CMERouter(config-controller)#pri-group timeslots 1-24
CMERouter(config-controller)#framing esf
CMERouter(config-controller)#linecode b8zs
CMERouter(config-controller)#clock source line
CMERouter(config)#interface serial:23
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104© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Dial Peers
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105© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
What is a Dial Peer?
• A dial peer is an addressable call endpoint.
• Dial peers establish logical connections, called call legs, to complete an end-to-end call.
• Cisco voice-enabled routers support two types of dial peers:
POTS dial peers: Connect to a traditional telephony network
VoIP dial peers: Connect over a packet network
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106© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Dial Peer
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107© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
POTS Dial Peers
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108© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
VoIP Dial Peers
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109© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Destination-Pattern Options
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110© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Default Dial Peer 0
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111© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Call Setup and Digit Manipulation
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112© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
End-to-End Calls
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113© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Matching Inbound Dial Peers
• incoming called-numberDefines the called number or dialed number identification service (DNIS) string
• answer-addressDefines the originating calling number or automatic number identification (ANI) string
• destination-patternUses the calling number (originating or ANI string) to match the incoming call leg to an inbound dial peer
• portAttempts to match the configured dial-peer port to the voice-port associated with the incoming call (POTS dial peers only)
Configurable parameters used for matching inbound dial peers:
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114© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Matching Outbound Dial Peers
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115© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digit Consumption and Forwarding
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116© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digit Collection
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117© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Digit Manipulation Commands
• prefix
Dial-peer command
Adds digits to the front of the dial string before it is forwarded to the telephony interface
• forward-digits
Dial-peer command
Controls the number of digits forwarded to the telephony interface
• number expansion table
Global command (num-exp)
Expands an extension into a full telephone number or replaces one number with another
• digit translation
Global and dial-peer command
Digit translation rules are used to manipulate the calling number, or ANI, or the called number, or DNIS, digits for a voice call
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118© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
PLAR Connection
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119© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction
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120© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction (COR)
Class of Restriction (COR)
• Provides a way to deny certain calls based upon the incoming and outgoing settings on dial-peers or ephone-dns
• Each dial-peer or ephone-dn can have one incoming COR and one outgoing COR
• Can be used to control access to dialable destinations that are internal to the enterprise or external to the enterprise
• Incoming COR list indicates the capacity of the dial peer to initiate certain classes of calls.
• Outgoing COR list indicates the capacity required for an incoming dial peer to deliver a call via this outgoing dial peer
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121© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction
Incoming COR Outgoing COR
or or
• The incoming COR is like having one or more keys
• The lack of an incoming COR is like having a master key that can unlock all locks
• The outgoing COR is like a lock or locks
• The lack of an outgoing COR is like having no lock
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122© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction
COR List on Incoming dial-peer or ephone-dn
COR List on Outgoing dial-peer or
ephone-dnResult Reason
No COR No COR Call Succeeds COR not applied
No COROutgoing COR
appliedCall Succeeds
The no (null) incoming COR condition has the highest COR priority
Incoming COR applied No COR Call SucceedsThe incoming COR list is a superset of the no (null)
outgoing COR list
Incoming COR applied is a superset of outgoing COR
Outgoing COR applied
Call SucceedsThe incoming COR list is
a superset of the outgoing COR list
Incoming COR applied not a superset of
outgoing COR
Outgoing COR applied
Call cannot be completed
The incoming COR list is NOT a superset of the
outgoing COR list
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123© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Steps to Configure Class of Restriction
• Step 1 – Configure the Class of Restriction names
• Step 2 – Configure the Class of Restriction lists and members
• Step 3 – Assign the COR list to the dial peers
• Step 4 - Assign the COR to the ephone-dns
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124© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
dial-peer cor customdial-peer cor custom
CMERouter(config)#
• Enters COR config mode where classes of restrictions are specified
name class-namename class-name
CMERouter(config-dp-cor)#
• Used to specify a class of restriction
Steps to Configure Class of Restriction
Step 1 – Configure the Class of Restriction names
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125© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
dial-peer cor list list-namedial-peer cor list list-name
CMERouter(config)#
• Provides a name for a list of restrictions
member class-namemember class-name
CMERouter(config-dp-corlist)#
• Adds a COR class to this list of restrictions
Steps to Configure Class of Restriction
Step 2 – Configure the Class of Restriction lists and members
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126© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
dial-peer voice number {pots | voip}dial-peer voice number {pots | voip}
CMERouter(config)#
• Defines a dial-peer and enters dial-peer config mode
corlist {incoming | outgoing} list-namecorlist {incoming | outgoing} list-name
CMERouter(config-dial-peer)#
• Specifies a COR list to be used when the dial-peer is either the incoming or outgoing dial-peer
Steps to Configure Class of Restriction
Step 3 – Assign the COR list to the dial peers
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127© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
ephone-dn tagephone-dn tag
CMERouter(config)#
• Defines an ephone-dn and enters ephone-dn mode
cor {incoming | outgoing} list-namecor {incoming | outgoing} list-name
CMERouter(config-ephone-dn)#
• Specifies a COR list to be used when the ephone-dn is used as either the incoming or outgoing part of a call
Steps to Configure Class of Restriction
Step 4 – Assign the COR list to the ephone-dns
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128© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction (COR)
Ephone-dn 1 Employee
Ext 1000
Ephone-dn 2 Executive
Ext 2000
dial-peer cor custom
name 1xxx
name 2xxx
dial-peer cor list Executive
member 1xxx
member 2xxx
dial-peer cor list Employee
member 1xxx
ephone-dn 1
number 1000
cor incoming Employee
ephone-dn 2
number 2000
cor outgoing Executives
• The executive can call the employee but the employee cannot call the executive
• The incoming COR Employee is not a superset of the Executive, so the call will not succeed
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129© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction – Case Study
Class of Restriction Case Study – XYZ company
• The XYZ company wishes to prevent toll fraud by restricting the destinations on the PSTN that IP phones and analog phones attached to FXS port can call.
• There should be no restrictions internally; everyone internal should be able to call anyone else internal
• All phones MUST be able to call 911
• Within the XYZ company there are Lobby phones, Employee phones, Sales, and Executive phones
• The Lobby phone should be able to call only 911 on the PSTN
• The Employee phones should be able to call 911 and local calls on the PSTN
• The Sales phones should be able to call 911, local calls, and domestic long distance on the PSTN
• The executives should be able to call 911, local call, domestic long distance, and international on the PSTN
• No one should be able to call 900 numbers
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130© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction – Case Study
dial-peer cor custom
name 911
name local
name long_distance
name international
name 900
911
local
long_distance
international
900
• Step 1 - Define the classes of restriction
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131© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction – Case Study
dial-peer cor list call911
member 911
dial-peer cor list callLocal
member local
dial-peer cor list callLD
member long_distance
dial-peer cor list callInt
member international
dial-peer cor list call900
member 900
dial-peer cor list Lobby
member 911
dial-peer cor list Employee
member 911
member local
dial-peer cor list Sales
member 911
member local
member long_distance
dial-peer cor list Executive
member 911
member local
member long_distance
member international
• Step 2 – Define the COR lists and members
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132© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction – Case Study
dial-peer voice 1 pots
destination-pattern 911
port 1/0/0
corlist outgoing call911
dial-peer voice 2 pots
destination-pattern 1[2-9]..[2-9]......
port 1/0/0
corlist outgoing callLD
dial-peer voice 3 pots
destination-pattern [2-9]......
port 1/0/0
corlist outgoing callLocal
dial-peer voice 5 pots
destination-pattern 1011T
port 1/0/0
corlist outgoing callInt
dial-peer voice 6 pots
destination-pattern 1900.......
port 1/0/0
corlist outgoing call900
Dial-peer 1 – COR out call911
Dial-peer 2 – COR out callLD
Dial-peer 3 – COR out callLocal
Dial-peer 4 – COR out callInt
Dial-peer 5 – COR out call900
• Step 3 – Assign the COR to the PSTN dial-peers
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133© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction – Case Study
ephone-dn 1
number 1001
cor incoming Lobby
ephone-dn 2
number 1002
cor incoming Employee
ephone-dn 3
number 1003
cor incoming Sales
ephone-dn 4
number 1004
cor incoming Executive
Ephone-dn 1 COR in Lobby
Ext 1001
Ephone-dn 2 COR in Employee
Ext 1002
Ephone-dn 3 COR in Sales
Ext 1003
Ephone-dn 4 COR in Executive
Ext 1004
• Step 4 – Assign the COR to the ephone-dns
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134© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony
Class of Restriction – Case Study
Ephone-dn 1 COR in Lobby
Ext 1001
Ephone-dn 2 COR in Employee
Ext 1002
Ephone-dn 3 COR in Sales
Ext 1003
Ephone-dn 4 COR in Executive
Ext 1004
Results:
• The Lobby ephone-dn can only call 911 on the PSTN
• The Employee ephone-dn can call 911 and local calls on the PSTN
• The Sales ephone-dn can call 911, local calls, and long distance on the PSTN
• The Executive ephone-dn can call 911, local calls, long distance, and international on the PSTN
• No one can call 900 numbers
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135© 2005 Cisco Systems, Inc. All rights reserved. Cisco PublicIP Telephony