Agenda Consolidation Cisco IP Telephony IP Telephony Components
But First . Quality Of Service (QoS) IP Phone Roadmap Call Manager
3.0 Distributed Call Processing Catalyst Enhancements So how does
this all work then Cisco AVVID Application Integration Design Guide
Summary
Slide 3
Consolidation PCs Distribution Server Farm Wiring Closet
VoiceMission- Critical Application Video Surveillance Mission-
Critical Application Web Servers PCs, Voice, Video, Business Apps
Four Different Traffic Types - all Mission Critical PCs, Voice,
Video, Business Apps
Slide 4
Key Technology Requirements for IP Telephony Reliability Dial
tone is always there Quality of Service WAN and LAN, good quality
voice always! Power & Current Infrastructure Integration eg:
cabling, integration with current PBX Scalability to Large Campus
Sizes Need to move beyond the current 200 user limit Application
Integration - Current and Future Call processing, Unified
Messaging, Call center etc. integration in the Enterprise space is
fundamental
Slide 5
Cisco AVVID An End-to-End Architecture Softphone MessageServer
Telephony Application Servers PagingServer DirectoryServers
ContentServer ContentServers IP Phones PCs Video Distributed
Adaptive Distributed Adaptive SERVICE SUPPORT GatewaySwitch Router
Cisco IP Fabric Intelligent Network Services Platforms
Infrastructure ClientsApplications Open Manageable Open Manageable
MessageServers CallManagerServers
Slide 6
PSTN What do I need for IP Telephony? Phones Supporting, H.323,
SIP or a low weight stimulus response protocol such as Skinny e.g.
Symbol, Cisco Gateways PBX and PSTN connectivity Applications and
Call Processing CallManager, voice mail, IVR, etc. Network
infrastructure Routers, switches, wire, WAN services
Slide 7
Where do all these bits fit? WAN PBX PSTN Cisco IP Phones:
12SP+/30VIP Next Generation Application Integration: Voice Mail
Dialing Plans Supplementary Services Cisco CallManager LAN Switches
provide QoS, inline Power and Switched Infrastructure Gateways
Provide Analog or Digital Access and QoS support
Slide 8
Open, Standards-Based Gateway Cisco Directory Server
CallManager Legacy PBX Voice-Enabled Router Cisco IP Phones QoS
Enabled Catalyst Switch Application Servers IP PSTN
Slide 9
Open System Applications New World Ecosystem IP Gateway
CallManager QoS Enabled Catalyst Switch Application Servers Telekol
Picazo Meet Me Conference PSTN Voice Mail/UMS from Amteva
Acquisition Call Center Applications from GeoTel Acquisition
Slide 10
Cisco IP Phones Firstly they look like phones... Soft key &
display based access to features and value-added services
Programmable soft buttons No paper labels, easy set installation /
relocation Integral 10BaseT Hub Locally powered Range of Voice
services G.711 & G.723.1
Slide 11
and if you have a lot of legacy phones Support via H.323 &
Skinny Connect existing circuit switched phones to an IP network.
Supported phones Lucent Definity all 8400, 6400 series and Call
Master 3 Nortel Norstar 7324, 7310, 7208 and 7100, Meridian M2006,
M2008, M2009, M2012, M2216, and M2616 Mitel SX-50, SX-200,SX-2000
Superset 410, 420, 430 (DNIC), and 4000 series Siemens Hicom
110E,150E, 300E All Optiset E, Rolm 9751 RP200, RP300, RP400, and
RP600 Ericsson MD110, Business Phone Dialog 3000 Still waiting for
BU decision on product
Slide 12
Cisco PSTN Gateways All Cisco IOS/CatOS Platforms The link from
IP to Circuit Switched - H323 Gateway Both Digital & Analogue
support Support for Supplementary Services (Hold, Transfer,
Conference, etc) Available today. PBX PBX PSTNPSTN PBX
Slide 13
5300 7202 72047206 7505 75077513 Small Branch Enterprise Branch
Central Site/ Regional Branch Headquarters 1750 Cisco Multiservice
Gateways Performance Scalabiliy and Density2600 3620 36403660 3810
DE 30+
Slide 14
Cisco Call Manager Provides intelligent Call Processing &
PBX functionality Advanced Call Control Scalable and on open
systems Fault tolerant Browser Accessed Standards based H323 and
MGCP support Application Integration Unified Messaging Call
Centres
Slide 15
Quality of Service - What is it? QoS = Preferential treatment
QoS prioritizes traffic into service levels and provides
preferential treatment to some traffic at the expense of lower
priority traffic Needed in both the LAN and the WAN All traffic
gets the same service We now have the possibility of three types of
traffic, all delay sensitive A traditional network is best-effort !
This will not work with a heavily loaded Voice enabled network
Slide 16
.1 G.711 G.729(a) G.723.1 64k + Header 8k + Header 6.3k/5.3kk +
Header 79.5k (on Ethernet) 20k/10k (on PPP) 18k/8k (on PPP) So How
Much Bandwidth Does A Voice Call Really Need ? Voice calls without
Compressed Real Time Protocol can take up as much as 80K on a WAN
link when using G.711 Administrator can defines which CODEC in
regions Currently no low-bitrate conferencing
Slide 17
Challenge Cisco Solutions Packet Residency Slow Link Freeze-out
by Large Packets Interleaving FRF.12, MLPPP, IP MTU Size Reduction,
Faster Link Bandwidth Consumption Header Size on Low Bandwidth
Links Compression Codecs, RTP Header Compression, Voice Activity
Detection WAN Oversubscription, Bursting Traffic Management Router
Traffic Shaping to CIR, High Priority PVC, Data Discard Eligibility
Congestion Delay and Delay Jitter Intelligent Queuing WFQ, IP
Precedence, RSVP, Priority Queuing VoIP Low Speed Link (
Cisco CallManager Cisco uOne Messaging Server IMAP4 Message
Store 5201 5202 CFNA-->5050 1-Call Setup 2-E.164 lookup 3-Call
Setup 4-Alerting (Ring) 4-Alerting (Ringback) 5-No Answer 8-Media
Connect 5050 6-Call Setup 7-Auto-Offhook 11-Greeting/tone playback
(SMTP) 13-Message Waiting 14-Message Waiting 11-Greeting/tone
playback (SMTP) 12-Record Message (RTP) 12-Record Message (SMTP)
LDAP v3 Directory 9-Get Subscriber 10-Set Subscriber All signaling
and media over IP Cisco CallManager Voice Mail call control 5201
dials 5202 - fwd to VM
Slide 39
Application Integration When my wife calls to tell me she's
going into labour, it's no big deal for an IP-based switch to look
into my scheduler, find the conference room I'm in and forward the
call there. Getting a traditional PBX to do that would take a whole
fleet of Andersen consultants. Christian Renaud, Cisco EVBU Product
Marketing 27th September 1999
Slide 40
Ring uOne Check My Calendar Cell / PDA IP Network If Its a
Customer, Ring Me Wherever! Ring If Sister Calls and I Am in a
Meeting, Send to Unified Messaging If Its the Boss, and Im not in a
Meeting, Ring Me but Dont Call Cell Ring Virtual Intelligent
Assistant
Slide 41
Design Caveats Maximum 200 users per CM No WAN connectivity
Call Manager cannot use Gatekeeper for Address Resolution (Does not
enhance dial plan scalability) No two sites may have same internal
dial plan Therefore only 1 instance of 1XXX, 2XXX, 3XXX etc Limited
to 10 Site Deployments Call Manager uses 128kbps in the ARQ (Only
going to use 80kbps for G.711) Call Manager registers EACH GK
Controlled H.323 device as a separate VoIP-GW with Gatekeeper
Slide 42
Router/GW PSTN V Site A Site B Site C IP WAN Router IP WAN
Router Call Manager V V Call Manager Call Manager Call Manager at
each site 200 IP Phones 100 Voice Mail Boxes GW Selection based on
PSTN signaling PRI - DT24+/DE-30+ or AS5300 T1/E1 CAS -
2600/3600/7200 MTP Required for IOS Gateways - Min 12.0(7)T =
Amteva Gate Server Message Store Directory Isolated
Deployments
Slide 43
Router/GW IP WAN (Primary Voice Path) PSTN (Secondary Voice
Path) V Site A Site B Site C IP WAN Router IP WAN Router Call
Manager V V Call Manager IOS Gatekeeper for Admission Control Call
Manager at Site 200 IP Phones 100 Voice Mail Boxes IOS Gateways
Required ALL G.711/80kbps for ALL IP WAN voice calls Maximum 10 IP
WAN sites Transparent PSTN Fallback if WAN Unavailable No Voice
Mail Networking Multi-site WAN Distributed Call Processing
Slide 44
Router/GW IP WAN Centralized Call Manager PSTN V Location Hub
Location 2 Location 3 V IP WAN Router V IP WAN Router Multi-site
WAN Centralized Call Processing Centralized Dial Plan 200 IP Phones
100 Voice Mail Boxes Admission Control - Location BW Limits must
Remotes must use Selsius GWs due to MTP 128kbps Minimum (Plan for
80kbps per Call even with Selsius Gateways) No Service if WAN down
(Unless Dial Backup)
Slide 45
Hub and Spoke Topologies Admission Control + Capacity Planning
Ensure voice traffic at every site does not exceed configured WAN
Bandwidth Minimum requirements for Voice, Video and Data shall not
exceed 75% of link or VC bandwidth (Remaining 25% for Routing
Protocol updates and link layer header BW consumption etc.)
Required Link Capacity = (Min BW for Voice + Min BW for Video + Min
BW for Data) / 0.75 Multi-site WAN Topologies
Slide 46
Call Manager 2.4 (Required) Voice/Email Messaging Server uOne
GateServer (4.1E) Message Store/Directory Directory uOne 4.1E 1.
100 Voice mail Boxes or less 2. Voice Messaging only 3. Appserver
requires Out of Band DTMF and is G.711 only (12.0(7)T) 4. Out of
Band DTMF from IOS GW need to be dtmf-relay h245-alphanumeric All
components on MCS-7830 Skinny Station Protocol Gateserver registers
as an IP Phone MCS-7830 Voice Messaging All in one Entry
Package
Slide 47
uOne Entry Edition Includes 100 user mailboxes 30 minutes
storage max per user 4 simultaneous streams (ports) of voice
messaging OPTIONAL 4 stream (port) upgrade (Maximum is 8 Ports) To
go beyond 8 ports or 100 users you will have to upgrade to a stand
alone uOne Enterprise Version
Slide 48
PSTN V Site A Site B Site C V V A A A CM 3.0 Isolated
Deployments Call Manager Cluster at each site 10,000 IP Phones Per
Cluster 2500 per Cal Manager No Limit to Number of Clusters (Each
Cluster is isolated PBX) G.711 - Makes no sense to compress calls
GW Selection based on PSTN signaling MTP Not Required
Slide 49
PSTN V Site A Site B Site C V V A A A IP WAN (Primary Voice
Path) Gatekeeper CM 3.0 Multi-Site Wan Distributed Call processing
Call Manager Cluster per site 10,000 IP Phones Per Cluster Max 10
Clusters (5 Redundant) - IOS GK for CAC G.711 or G.729 for WAN (C6K
DSP Farm required for G.729 & Conference) GW Selection based on
PSTN signaling MTP Not Required
Slide 50
Location Based Admission Control and Cluster Interaction Not
Supported Supported Cluster1CMA Cluster1CME Cluster1CMD Cluster1CMC
Cluster1CMB Location 1 Location 2 One CCM in a clusterOR up to
Three CCMs in a Cluster Providing: 1. All Phones always registered
with same Cisco CallManager 2. Achieved by keeping all Phones with
same CM Group list order 3. Creation of a Locations Cluster of two
or three 4. Possible Location status synch during CM failover -
self healing B A Location 1 Location 2 Primary CM Backup CM
Locations WAN Cluster Remote Sites Central Site Remote Sites
Central Site C Backup CM
Slide 51
Router/GW Call Manager IP WAN Compressed Call Leg in the IP WAN
DSP Resource at Central Site uOne Gateserver DSP = DSP Farm G.711
Call Leg Compressed Call Leg Supported/Committed for 3.0 DSP 3.0
Solution Set No DSP Farm or Cisco CallManager at remote sites
Slide 52
GW Router/GW IP WAN Centralized Call Manager V PSTN V Site1
Site2 Dial 9 for Local PSTN GW Partition 1. Devices with similar
reachability characteristics 2. Items placed in Partition: IP
Phones, DNs, Gateways + Route Patterns Calling Search Space 1.
Which Partitions a device may search in for a dialed number 2.
Provides dialing permissions/restrictions 3. Each device assigned a
Calling Search Space 3.0 Dial Plan Enhancements - Partitions
Centralized Call Manager but Distributed Dial Plan
Slide 53
3600 IP WAN 337-1XXX 447-2XXX V V Dial Plan - Robust Digit
Manipulation PSTN Voice Overflow User dials 447-2222 1111 2222 2222
Presented to Call Manager 3600 IP WAN 337-1XXX 447-2XXX V V PSTN
Voice Overflow User dials 447-2222 1111 2222 2222 Presented to Call
Manager Call Manager strips 447 for IP WAN Call Manager pre-pends
1610 for PSTN Call Placed Across IP WAN Call rejected Across IP
WAN, takes PSTN Gatekeeper
Slide 54
IOS GW Call Manager with Amteva Gateserver 1. Allows for IOS
GW/Call Manager Integration without MTP (Greater Scalability)
2.MGCP support for Analog IOS GW interfaces ONLY (FXS & FXO) 2.
MGCP support for Analog IOS GW interfaces ONLY (FXS & FXO) 3.
Fax will require G.711 Operation with MGCP PSTN V Design
Characteristics IOS GW Call Manager with Amteva Gateserver PSTN V
Initial Call - Direct from GW to IP Phone No MTP Required Call
Transfer - Allow Supplementary Services Skinny Station MGCP Voice
Path MGCP Elimination of MTP
Slide 55
IOS GW Cisco CallManager with Amteva Gateserver 1. Allows for
IOS GW/Call Manager Integration without MTP (Greater Scalability)
2. IOS gateways with Digital Interfaces without MTP 3. Minimum IOS
12.0(7)T PSTN V Design Characteristics IOS GW Cisco CallManager
with Amteva Gateserver PSTN V Initial Call - Direct from GW to IP
Phone No MTP Required Call Transfer - Allow Supplementary Services
Skinny Station H323v2 Voice Path Elimination of MTP H.323v2 with
Open Closed Logical Channel
Slide 56
IOS Gatekeeper V V Router/GW CallManager Cluster CallManager
Cluster IP WAN Design Characteristics Compressed WAN Call Leg
across IP WAN Gatekeeper used for Admission Control with PSTN
Fallback Cisco uOne Gateserver Cisco uOne Gateserver V = DSP Farm
G.711 Call Leg Compressed Call Leg Site A Site B Call Manager and
DSP Farm at each site
Slide 57
Summary & Conclusion LAN & WAN Infrastructure needs QoS
Without it give up and go home ! Network Design should support
redundancy Voice systems do today ! Ciscos has solutions to support
Voice/Video/Data enabled networks Cisco AVVID Packet Voice Is A
Real Solution ! Cisco AVVID Architecture Powerful, flexible IP
architecture that supports Intelligent Integrated Applications
Cisco AVVID Advanced Applications