Cisco Enhanced Digital Return 85 System: Modules for Cisco Prisma II and Prisma II HD Chassis Data Sheet

The Cisco^® Enhanced Digital Return (EDR) 85 System expands the functionality of our Cisco Prisma^® II products by increasing the performance, reach, and efficiency of the reverse path transmissions.

For systems based on Prisma II, the Cisco EDR 85 System includes the EDR Transmitter module inside of a Cisco Prisma II HD EDR host module and companion Cisco Prisma high-density (HD) EDR PRX85 Transmitter modules that install in a Cisco Prisma II or Prisma II XD chassis at the headend or hub. The transmitter and receiver use Small Form Factor Pluggable (SFP) optical pluggable modules (OPMs) for enhanced flexibility. The Cisco EDR 85 System operates over the 5-85 MHz range and supports all standard reverse frequency bandwidths at 40, 42, 55, 65, and 85 MHz.

At the transmit end of the system, reverse-path RF input signals are routed to an EDR 2:1 Transmitter module. The transmitter module converts each signal to a baseband digital data stream and combines the signals into a serial data stream using time-division multiplexing (TDM). The baseband data stream is then converted to an optical signal for transmission to the headend or hub EDR Rx. The transmitter OPMs are available in either Coarse Wavelength Division Multiplexing (CWDM) 1270-1610 nm wavelengths or Dense Wavelength Division Multiplexing (DWDM) ITU channels (17-61 nm).

A single Cisco Prisma II EDR Transmitter module (Figure 1) occupies two slots in a Cisco Prisma II XD chassis. Two EDR HD transmitter modules can be vertically stacked in an associated Prisma II host module. They occupy two slots in the Prisma II standard chassis. Up to 12 HD EDR Transmitter modules can operate in a standard 6 rack unit (6RU) chassis (the 56-connector version of the chassis is required to make use of both receivers in one chassis slot). Up to 8 HD EDR Transmitter modules can operate in the Prisma II XD chassis. The ability to mix EDR Transmitter modules with other Prisma II HD modules in the same chassis greatly enhances the flexibility of the platform.

At the receive end, typically in a large hub or headend, the EDR Receiver module receives the optical signal and performs the conversion back to the baseband data stream. The resulting data streams are converted back to analog reverse path signals for routing to termination equipment. The EDR Receiver module is available in the High Density form factor. The receiver OPMs are available in Standard Range (SR) and Extended Range (XR) configurations. Both configurations feature a dual LC/PC optical input connector that feeds two independent reverse optical transmitters, each with its own RF output port.

A single EDR Receiver module (Figure 2) occupies one slot in a Cisco Prisma II XD chassis. Two EDR HD receiver modules can be vertically stacked in an associated Prisma II Host Module that occupies a single-wide slot in the Prisma II standard chassis. Up to 26 HD modules can operate in a standard 6 rack unit (6RU) chassis (the 56-connector version of the chassis is required to make use of both receivers in one chassis slot). Up to 16 HD modules can operate in the Prisma II XD chassis. The ability to mix EDR Receiver modules with other Prisma II HD modules in the same chassis greatly enhances the flexibility of the platform.

Features

●   High-performance digital reverse technology:

◦     12-bit encoding that helps enable transmission of analog video in the reverse band

◦     High-order digital modulation signals (for example, 16 quadrature amplitude modulation [QAM], 64 QAM, and 256 QAM)

●   Multiple operating modes in the EDR transmitter that support the EDR transmitter and the older integrated 2:1 bdr node transmitter

●   Optical pluggable modules that provide flexible inventory management

●   Long-reach transmission capabilities that eliminate the need for optical amplifiers, reducing cost and space requirements

●   Capability to send 90 individual 5-85 MHz reverse signals over a single fiber:

◦     Use of 2:1 multiplexing to reduce fiber usage

◦     Compatibility with Cisco’s 45-wavelength DWDM system

●   Support for independent balancing of reverse traffic at EDR transmitter RF ports

●   Simplified setup that reduces installation time and expertise requirements

●   Distance- and temperature-independent link performance that simplifies engineering and maintenance requirements

●   Space-saving, high-density deployment in Prisma II or Prisma II XD chassis to increase deployment cost-efficiency

●   Ability to monitor the Cisco Prisma II EDR transmitter via the Cisco Prisma II EDR receiver

Block Diagrams

Figure 3 provides a block diagram of the EDR systems for 2:1 transmission.

Product Specifications

Table 1 lists specifications for the Cisco EDR 85 System Transmitter modules. Table 2 gives specifications for the EDR Receiver module. Table 3 lists RF link performance specifications.

Table 1.       Cisco EDR 85 System Transmitter Modules

Table 2.       Cisco EDR 85 System PRX85 Receiver Module

Note:     

Table 3.       RF Link Performance

Notes:

Tables 4 and 5 provide group delay and optical link specifications. Figure 9 shows noise power ratio (NPR) performance.

Table 4.       Group Delay, 1-MHz Bandwidth

Table 5.       Optical Link Characteristics

Notes:

Notes:

Ordering Information

Cisco Prisma II EDR Transmitters are sold as a combination. There is a comprehensive selection of DWDM and CWDM wavelength Optical Pluggable Modules (OPMs) available for the EDR Transmitter modules. See table 6 for the lists of these OPMs. OPMs are sold separately from the Tx and host module. Table 7 lists part numbers for Cisco Prisma EDR Tx and Rx equipment, additional required equipment, and accessories.

Transmitter 2:1 Optical Pluggable Module (OPM) Order Matrix

Table 6.       DWDM and CWDM Wavelengths

Table 7.       Cisco Prisma EDR Required Equipment

Service and Support

Using the Cisco Lifecycle Services approach, Cisco and its partners provide a broad portfolio of end-to-end services and support that can help increase your network's business value and return on investment. This approach defines the minimum set of activities needed by technology and by network complexity to help you successfully deploy and operate Cisco technologies and optimize their performance throughout the lifecycle of your network.

Contact

Cisco Systems, Inc.

1 800 722-2009 or 678 277-1120

http://www.cisco.com

For More Information

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