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Administration and Provisioning
8-8 Issue 1 December 1997
OC-3c to OC-12 (Optional Feature) 8
This application is a feature package option which must be enabled using the
set-feat command.
A function unit can be optionally equipped with 21-type OLIUs for OC-3c
transport. The incoming OC-3c signal is electrically converted into an STS-3c
signal. Four STS-3c or a mix of STS-3c and STS-1 signals are multiplexed into an
STS-12 signal and converted into an OC-12 signal for transport over the OC-12
line.
When the function unit service and protection slots are equipped with OLIUs, they
can be provisioned as ring (0x1) low-speed interfaces or linear (1+1) optical
extensions using the set-oc3 command. The cross-connections can then be
made using the ent-crs-sts3c command. See Section 11, "Commands and
Reports," for more information on this provisioning.
EC-1 to OC-12 8
The 3STS1E low-speed interface receives an EC-1 signal from the backplane
coaxial connector which is then routed as an internal STS-1. This signal is STS-1
cross-connected to the OC-12 interface. At the OC-12 interface, these internal
STS-1 signals are multiplexed into an STS-12 and converted to an optical OC-12
signal.
Cross-connections are made using the ent-crs-sts1 command. See Section
11, "Commands and Reports," for more information on this command.
In the opposite direction, a received OC-12 is converted into an electrical STS-12
and demultiplexed. After STS-1 cross-connections, the resulting STS-1 internal
signal is converted to an EC-1 signal by the 3STS1E interface. The following are
examples of STS-1 cross-connections in ring networks:
a-1 to mb-1
c-3 to mb-5
d-2 to mb-7
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