Cisco GS7000 1218-MHz 4-Port Fiber Deep Node, 85/102-MHz Split with Cisco Smart PHY Model 120 RPD Data Sheet

Product description

Consumer bandwidth demand continues to grow at a rapid rate every year. As a result, cable operators with devices based on DOCSIS need to prepare their networks for the future. They need to plan for reduced service group sizes and ultimately for double or quadruple (or greater) bandwidth speeds. The Cisco^® GS7000 1218-MHz 4-Port Fiber Deep Node coupled with the Cisco Smart PHY Model 120 1x2 RPD (Remote PHY device) module enables them to implement these plans.

An extension of the modular headend architecture, MHAv2 splits CMTS functions so that CCAP core and physical-layer functions can run separately in different locations. CCAP core routing can run out of larger hubs (or even cloud CMTS instances in a data center), while QAM and ODFM modulation gets pushed out to Remote PHY Devices (RPDs) located nearer to subscribers.

Remote PHY is the product of cable operators asking the industry to help them overcome the limitations of analog fiber and break through the HFC bottleneck. In its most basic form, Remote PHY unlocks major bandwidth increases in existing access networks. But it also enables “fiber deep” architectures that push digital fiber out much closer to homes. Ultimately, Remote PHY helps cable operators deliver capacity and gigabit service tiers on par with any pure-fiber competitor, at a fraction of the cost of ripping and replacing the existing HFC plant.

With Remote PHY, you can deploy fewer sophisticated CCAP routing platforms, connected to many smaller-footprint, less expensive RPDs. You don’t have to run a large number of full-featured I-CMTS platforms at every hub, consuming huge amounts of space and power as you scale, and requiring advanced onsite expertise to deploy and maintain. You can consolidate CCAP core functions to larger hubs or data centers and push digital fiber deeper into your access network—in some cases, all the way to the node. You only have to worry about converting to analog HFC for the last few hundred feet to the residence. And you can dramatically boost bandwidth to every home.

The Cisco Smart PHY Model 120 RPD has been integrated with the Cisco Smart PHY deployment automation software. Cisco Smart PHY deployment automation software is a microservice-based software tool that enables full automation for provisioning, configuration, and maintenance of standards based RPDs, shelves, and Cisco Remote PHY cores.

GS7000 Fiber Deep Node features

●   Highest output capable Gallium nitride (GaN) gain stages

●   Easy forward and reverse RF split changes

●   Field-accessible plug-in forward interstage linear equalizers

●   1218-MHz accessories in the Cisco GainMaker^® style

●   Onboard three-state reverse switch (on, off, and 6 dB) allows each reverse input to be isolated for noise and ingress troubleshooting (status monitoring or local control module required)

●   Fiber entry ports on both ends of housing lid

●   Fiber management tray and track for easy access to fiber connections

●   Primary and (optional) redundant power supplies with passive load sharing

●   Spring-loaded seizure assemblies to allow coaxial connectors to be installed or removed without removing amplifier chassis

●   Dual or split AC power

Remote PHY Module features

●   1x1 and 1x2 (downstream x upstream)

●   Upstream capacity: 12 U.S. channels per port or 2 OFDMA blocks (96 MHz per port)

●   Downstream capacity: 160 narrowcast QAMs plus 6 OFDM 192-MHz Orthogonal Frequency-Division Multiplexing (OFDM) blocks per port

●   Flexible QAM channel frequency placement

●   Broadcast, VOD, and SVD SCTE55-1 and SCTE 55-2 (future) OOB

●   PowerKEY, VPME, and DVB

●   Dual 10 GbE pluggable SFP+

●   Path redundancy (future)

●   Daisy chaining (future)

●   AGC and leakage detection tone generation

●   U.S. monitoring

Node block diagram

Figure 1 provides block diagrams of node forward and reverse paths. Figure 2 provides the MHAv2 reference architecture diagram.

RPD and RF performance specifications

Table 1 provides specifications for the Remote PHY Module. Tables 2 and 3 summarize RF station performance characteristics for the GS7000 SHO node.

Table 1.       Specifications for Remote PHY Module

Unless otherwise noted, specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based on measurements made in accordance with SCTE and ANSI standards (where applicable), using standard frequency assignments.

Table 2.       GS7000 RF section general station performance

Unless otherwise noted, specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based on measurements made in accordance with SCTE and ANSI standards (where applicable), using standard frequency assignments.

Table 3.       Forward and reverse station performance

 

Unless otherwise noted, specifications reflect typical performance and are referenced to 68°F (20°C). Specifications are based on measurements made in accordance with SCTE/ANSI standards (where applicable), using standard frequency assignments.

Notes:

1.     Forward performance is for the station from the output of the optical receiver to the node RF output port, with 0 dB pad in the Optical Interface Board (OIB), any forward configuration module, 0.5 dB interstage (I/S) pad, 18 dB linear I/S equalization factory-selected output pad, and signal director jumper. This specification includes OIB losses.

2.     The reference output tilt and internal tilt are both linear tilt.

3.     The forward reference output tilt specified is achieved through field installation of appropriate linear I/S equalization, in conjunction with the internal tilt of the launch amplifier and the tilt associated with the optical link (transmitter and receiver combination).

4.     Reverse performance is for the station from the reverse input port to the input of the reverse optical transmitter module, with 0 dB reverse input pad.

5.     Forward path port-to-port isolation as not specified due to the 1x only downstream configuration for the 4-port fiber deep GS7000 node.

Other specifications

Tables 4 through 7 list other specifications for the GS7000 SHO node.

Table 4.       Station delay characteristics

Table 5.       Electrical data

Table 6.       Station powering data

AC currents specified are based on measurements made with a typical CATV type ferro-resonant AC power supply (quasi-square wave).

The DC supply has a fixed undervoltage lockout of 33V AC.

Table 7.       Environmental and mechanical specifications

Ordering information

The GS7000 node is available in a variety of configurations, shown in Table 8. Table 9 lists optical SFP+ module options. You can also select other components during the ordering process (Table 10). Consult with your account representative, customer service representative, or system engineer to determine the best configuration for your particular application.

Table 8.       Cisco GS7000 1.2-GHz node configurations

Table 9.       Optical SFP+ module options

Table 10.     Cisco GS7000 additional components

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