Casa Systems Remote PHY Solution

Remote CCAP PHY Node (RCN) and CCAP Service Card (CSC8x10G)

Overview

Casa Systems’ C100G is an award-winning CCAP solution that combines a DOCSIS® 3.1 CMTS and an Edge-QAM in a high density, high availability 13 RU platform. The platform and modules support the CableLabs’ DOCSIS 3.1 standard, and are backward compatible with prior DOCSIS standards. Deployed by some of the world’s leading service providers, the C100G’s software defined architecture, industry-leading density, and integrated video capabilities provide a clear competitive edge in the delivery of ultra-broadband services.

Casa has long been a leader in access network solutions for cable service providers. We are continuing our technology leadership with a solution for distributing access functional-ity to meet ever-growing capacity demands. Casa’s Remote-PHY solution, designed to CableLabs’ RPHY specifications, stays within CCAP framework, allowing service providers to evolve smoothly to a distributed access solution which is managed like current CCAP devices, supports all current CCAP services, and requires no changes to existing cable modems or set top devices.

Our solution consists of a Remote CCAP PHY Node (RCN) and a new card for the C100G or C40G, the CCAP Service Card (CSC8x10G) for aggregating RCNs. In this architecture, illustrated to the right, the DOCSIS and EQAM MAC functions are centralized in the CCAP Core (the C100G/C40G located in the headend/hub), and the DOCSIS and EQAM PHY functions are in a remote node (the RCN) closer to the subscribers. 10G Ethernet or 10G EPON transport can be used between the C100G and the RCN.

Casa Systems’ Remote-PHY solution provdes CCAP features from a standards-based Remote-PHY architecture and gives service providers a new option for meeting subscriber demand with the least possible change to current operations.

• 10Gbps

• Full DOCSIS 3.1 Support

• Full CCAP Features

Casa Systems Remote PHY Solution

The CSC is a new line card that can be deployed in Casa’s C100G or C40G chassis. The CSC provides the DOCSIS and EQAM MAC functions and performs traffic aggregation for the Remote PHYs. The CSC supports 8x10G interfaces over which DOCSIS and EQAM services are carried over layer 2 tunnels to the Remote PHYs. The CSC card can support up to at least 32 RCNs/10Gbps link. Pluggable SFP+ optics are supported for a pay as you grow business model. The CSC can be used as either an 10G Ethernet line card or an 10G EPON line card by using the appropriate SFP+ transceivers. All other CCAP components are unchanged.

Narrowband Digital Forward (NDF) and Narrowband Digital Return (NDR) are supported along with 2 separate Out-Of-Band (OOB) interface pairs for the seamless transport of (i) analog OOB signaling between legacy set top boxes and headend OOB modulator and demodulators and (ii) telemetry to nodes, power supplies and amplifiers over the digital network.

A C100G (and C40G) can be deployed with a mix of integrated CCAP cards (i.e., DS8x96 or DS8x192 and US16x8) and CSC cards, allowing the operator to provide centralized and distributed CCAP services in an efficient manner in terms of cost and headend space.

CCAP Service Card (CSC8x10G)

CSC8x10G

• Remote CCAP Phy Node (RCN) aggregation module

• Deployable in Casa’s C100G or C40G CCAP

• 8x10GbE ports to connect to RCNs

• Supports 10G Ethernet and PON pluggable optics

• Supports upstream

and downstream OOB signaling to/from legacy STBs

Remote CCAP PHY Node (RCN)

Providing service providers with optimum flexibility, Casa Systems offers our Remote CCAP PHY Node (RCN) in two sizes. Casa’s RCN large node can be equipped with 1 or 2 R-PHY modules; the small node can be equipped with 1.

CSC8x10G

CSC 8x10G

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Casa Systems Remote PHY Solution

Each R-PHY module supports 1.2 GHz (full spectrum) downstream and 100 MHz mid-split upstream. Service group options for DOCSIS 3.0 and / or DOCSIS 3.1 are shown in the following table.

An RCN with 2 RPHY modules can support 2 service groups (SGs). Each RPHY module in an RCN can have its own 10Gbps EPON or Ethernet uplink and a standby port for 1+1 port protection. Alternatively, the RPHY modules within a large RCN can be daisy chained together and connect to the optical network via a single 10G port with standby.

Service Group Options DOCSIS 3.0 DOCSIS 3.1Downstream 128 QAM channels 128 QAM channels + 2

OFDM channelsUpstream 2x8 A-TDMA

channels2x (4 A-TDMA channels + 1 OFDMA channel)

Casa’s design takes into account the fact that service providers may need to locate the RCN in locations that are not as secure as typical headend sites, neither from an environmental nor external threat perspective. The RCN is waterproof and can work in temperatures ranging from -40C to +60C. It is managed through the headend C100G integrated CCAP rather than through a direct management interface. For security purposes, this prevents change of configuration or alteration of the behavior of the RCN through direct access. The management/control traffic between the headend C100G and the RCN is secured by IPSec to guard against man-in-the-middle attacks. User data between the cable modem and the C100G is secured by DOCSIS BPI+ protocol. Video traffic is secured by DVB Simulcrypt, PME, or PKE, in the same way as in an integrated CCAP.

Large Node with 2 RPHY Modules

CSC 8x10G

Weather hardened, secure connections to CSC via IPSec

Large Node

CSC 8x10G

Small Node

CSC 8x10G

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Key Benefits

Casa Systems Remote PHY Solution

As with any distributed CCAP solution, an RPHY architecture allows an operator to increase density and subscriber bandwidth with a minimal increase of headend equipment. Benefits of the Casa Systems’ architecture over alternative architectures include the following:

• Lower complexity, lower cost. Retaining the MAC functions in the headend reduces the complexity and costs of the node. Specifically, reduced complexity means fewer failures and thus, fewer truck rolls. MAC functions have historically changed more frequently and more dramatically as a result of new standards. Keeping these functions in the headend means fewer instances of software upgrades across the network.

• Strong security. The node is not as secure a location as a headend or hub. In the Remote PHY architecture, all encryption/decryption and key management is performed in the headend/hub. Thus, user traffic at the node is automatically protected.

• Continuity and simplicity. Defined within the CCAP framework, the Remote CCAP PHY Node (RCN) supports all current CCAP services and can be introduced into the network without requiring changes to existing Cable Modems or set top devices. Further, from a management perspective, the RCNs are presented as extensions of the CCAP core, and collectively managed as a single, large CCAP.

• Graceful migration. Keeping MAC functions centralized enables a more graceful virtualization approach in which management and control functions can be virtualized first, followed by virtualization of MAC functions.

• Inter-operability. Casa’s solution is designed to meet the CableLabs’ Remote PHY standards (including the RPHY OSSI). This allows for interoperability between different CCAP Core and RPHY vendor solutions without requiring specialized development or back office upgrades.

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Remote CCAP PHY NodeTechnical Specifications

Small Node Large Node

GeneralPhysical Dimensions (LxWxH) 413 x 400 x 142mm

16.2 x 15.7 x 5.59 inches580 x 300.75 x 226mm22.8 x 11.8 x 8.9 inches

Mounting Aerial Stand and Pedestal Aerial Stand and Pedestal

Weight: (Max) 33.6 lbs (15.2 kg) 53 lbs (24 kg)

Weight: (Min) 30 lbs (13.6kg) 49 lbs (22.2 kg)

Connectors 4 4

Total Power (Max Power) 100W 170W

Typical Total Power (4 ports segmented Master & Slave)

100W 170W

Min. Total Power (2 ports) 95W (no optical receivers) 100W

Supply Voltage 90 - 240 VAC (via AC input)or40 - 90 VAC (via Hardline)

40 - 90 VAC (via Hardline)

Optical Connectors 2x 10GE SFP+ 2x 10GE SFP+

Test Point Connectors 2x Internal (1xFWD, 1xRVR)1 External

2x Internal (1xFWD, 1xRVR)1 External

Environmental

Operating Temperature -40C to 60C -40C to 60C

Operating Humdity 5% to 95% 5% to 95%

Waterproof IP67 IP67

DOCSIS

Standard DOCSIS 3.1EuroDOCSIS3.0 (Annex A)DOCSIS 3.0 (Annex B)

DOCSIS 3.1EuroDOCSIS3.0 (Annex A)DOCSIS 3.0 (Annex B)

DS Frequency Range 54MHz - 1.218GHz 54MHz - 1.218GHz

DS Segments 1 2

US Segments 2 4

DOCSIS 3.0 SG per Segment Up to 128 DS channels; No. of US channels: 8

DOCSIS 3.1 SG per Segment Up to 6 OFDM DS channels; Up to 2 OFDM US channels

US QAM Modulation QPSK, 8, 16, 32 and 64 QAM

US OFDMA Modulation QPSK, BPSK, 8, 16, 32, 64, 128, 256, 512, 1024

US Channel Width 1.6 MHz/3.2 MHz/6.4 MHzOFDMA: Up to 96 MHz

1.6 MHz/3.2 MHz/6.4 MHzOFDMA: Up to 96 MHz

US Frequency Range 5-100 MHzUpgradable to 5 - 204 MHz with future R-PHY Node

5-100 MHzUpgradable to 5 - 204 MHz with future R-PHY Node

Casa Systems Remote PHY Solution

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Casa Systems, Inc.100 Old River RoadSuite 100Andover, MA 01810

Tel: 978.688.6706Fax: 978.688.6584

info@casa-systems.comwww.casa-systems.com

Casa Systems Remote PHY Solution

Remote CCAP PHY NodeTechnical Specifications

Small Node Large Node

DOCSIS (cont’)Minimum US Input +15 dBmV +15 dBmV

DS QAM Modulation 64, 128, 256 QAM 64, 128, 256 QAM

DS OFDM Modulation BPSK, QPSK, 8, 16, 64, 128, 256, 512, 1024, 2048, 4096 QAM

BPSK, QPSK, 8, 16, 64, 128, 256, 512, 1024, 2048, 4096 QAM

DS Channel Width SC-QAM: 6 MHz/8 MHzOFDM: Up to 192 MHz

SC-QAM: 6 MHz/8 MHzOFDM: Up to 192 MHz

DS Frequency Range (center) 57 MHz - 1.218 GHz 57 MHz - 1.218 GHz

Maximum Output Power (per channel each port)

60 dBmV 60 dBmV

Output CTB 60 dBc 62 dBc

Output CSO 62 dBc 62 dBc

Output CNR 51 dBc 51 dBc

Hum Modulation 55 (5-104 MHz)60 (258-1218 MHz)

55 (5-104 MHz)60 (258-1218 MHz)

Cross Modulation (Xmod) 58 dB 58 dB

Output Tilt (pluggable) 10 dB minimum18 dB max

10 dB minimum18 dB max

Output Return Loss 16 dB 16 dB

Modulation Error Rate 46 dB (equalized) 46 dB (equalized)

Wideband Noise -73 dBc -73 dBc

Redundant Optical ReceiversOptical Input Level -7 dBm to +2 dBm -7 dBm to +2 dBm

RF Frequency Range 54MHz to 1002 Mhz 54MHz to 1002 Mhz

Optical Wavelength 1550 nm 1550 nm

CNR 51 dB 51 dB

Connector SC/APC SC/APC

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