Cisco Cisco Compact Broadband Node CBN1222 CBN1224 Data Sheet
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Data Sheet
Cisco Enhanced Digital Return (EDR) 85 System
–
Compact Segmentable Nodes
The Cisco
®
Enhanced Digital Return (EDR) 85 System expands the functionality of
Compact Segmentable Nodes by increasing the performance, reach, and efficiency of the
reverse path transmissions.
The Cisco EDR 85 System includes EDR Compact Segmentable Node A9020x Transmitter
modules that install in the node, and companion 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 SFP (Small Form Factor Pluggable) style 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, the reverse path RF input signals from each node port are
routed to an EDR 2:1 Transmitter module in node mainboard. The transmitter module converts each
signal to a baseband digital data stream and combines them into a serial data stream using time
division multiplexing. The baseband data stream is then converted to an optical signal for
transmission to the headend or hub. The 2:1 transmitter modules is available for the Cisco Compact
Segmentable Nodes type A90200 and A90201. 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.
At the receive end, typically in a large hub or headend, the EDR Receiver module receives the
optical signal and performs 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 half-height High Density (HD) 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 occupies one slot in a 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
6RU chassis*, while 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.
* The 56-connector version of the chassis is required to make use of both receivers in one chassis
slot.