Circuit Pack Descriptions
7-86 Issue 8.0 July 2002
OC48 RCVR A/D (839B2, 839B4B, 839B5, and
839E5) Circuit Pack Description 7
Purpose of Circuit 7
The OC48 Receiver (OC48 RCVR A/D) circuit pack provides a high speed
interface between an incoming OC-48 optical signal (2.5 Gb/s) and sixteen 155.52
Mb/s electrical signals. The 839B2 OC48 RCVR A/D circuit pack is used in
bidirectional ring applications and is compatible with Release 3.0.1-ADR and later
software. The 839B4B OC48 RCVR A/D circuit pack is a cost-reduced version of
the 839B2 OC48 RCVR A/D circuit pack and is compatible with Release
7.0.0-ADR and later software.
The 839B5 OC48 RCVR A/D circuit pack is an enhanced version of the 839B4B
OC48 RCVR A/D circuit pack with an STS-1 time slot assignment capability that
allows STS-1 cross-connections. The 839B5 OC48 RCVR A/D circuit pack is
compatible with Release 7.0.0-ADR and later software.
The 839E5 OC48 RCVR A/D circuit pack provides an STS-1 time slot assignment
capability that allows STS-1 cross-connections. This circuit pack is tuned
"optimized" for the 1550 nm band and is required to support the DWDM feature
(739E[1-16] circuit packs).
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