Performance
| Wavelength-division multiplexing (WDM) |
Y |
| Wavelength |
1290 nm |
EDR 1:1, Tx OPM, CWDM, 1290nm
The Cisco®Enhanced Digital Return (EDR) 85 System expands the functionality of Cisco GS7000 and Cisco GainMaker® Nodes by increasing the performance, reach, and efficiency of the reverse path transmissions.
The Cisco EDR 85 System includes EDR Transmitter modules that install in GainMaker and GS7000 Nodes, and companion Cisco Prisma® high-density (HD) EDR PRX85 Receiver modules that install in a 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 (node) end of the system, reverse-path RF input signals from each node port are routed to an EDR 2:1 or EDR 1:1Transmitter module in the housing lid. 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. The double-wide (2:1) transmitter modules occupy two transmitter slots and the 1:1 modules occupy one slot. The EDR 2:1 Transmitter is available for the GS7000 and GainMaker (4-Port or Reverse Segmentable) platforms (Figure 1). The EDR 1:1 Transmitter is available for the GS7000 and all GainMaker Node platforms (Figure 1). 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).
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 receivers, 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.
