Circuit Pack Descriptions
7-34 Issue 8.0 July 2002
In the receive direction, the receive byte processor (RBP) on the OC48
Regenerator (OC48 REGENR) circuit pack transmits the overhead bytes via the
overhead channel to the overhead byte interface. The overhead byte interface
then demultiplexes the overhead bytes and makes them available for use.
Table 7-4 shows the overhead bytes that are provided by the OW circuit pack.
Power Circuitry 7
The OW circuit pack receives two sources of −48 volts that are diode OR'd, fused,
and filtered. A modular DC-to-DC power converter produces +5 volts used on the
circuit pack.
Quick Reference Summary 7
The OW circuit pack performs the following control and interface functions:
a. Provides communications between the transmit byte processor on the
OC48 REGENR circuit pack and the receive byte processor on the OC48
REGENR circuit pack via the overhead channel
b. Combines the section orderwire and user bytes to form the transmit
overhead channel
c. Splits the received overhead channel into the section orderwire and user
bytes
d. Sends/receives the section orderwire and user bytes to/from the
interconnection panel.
Table 7-4. Section Overhead Bytes
Name Section Overhead Byte Data Rate Access
Orderwire E1 64 kb/s InterconnectionPanel
User F1 64 kb/s InterconnectionPanel
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