Channel Group Network Compatibility; Ioc Failure Detection - Paradyne COMSPHERE 6800 Series Multiplexer Management And Configuration Manual

fixed route
The entries made for routing choices determine how a channel group is initially routed and how it
will be rerouted during a network or facility failure as follows:
first choice
second choice
third choice

Channel Group Network Compatibility

Channel groups can be configured to be network compatible, i.e., to carry specific types of
channels that are network compatible. Network compatible channels are channels whose
bandwidth (minus the channel group framing bits) equals the size of one DS0. Placing these
channels into a channel group designated as network compatible uses the T1 facility more
efficiently by saving bandwidth. The following channel types are network compatible.
More than one network compatible channel can be assigned to the same channel group. However,
the network compatible channels within the same channel group must all be of the same type.

IOC Failure Detection

The currently available 740 nodes have incorporated a feature known as Interoffice Carrier (IOC)
Failure Detection that is designed for non-network compatible channel groups whereby the nodes
use the presence of persistent loss of channel group synchronization to detect a failure in the
interoffice portion of the network. Once this failure is detected, the channel group is automatically
disconnected by the nodes. Using the Logical Link feature, the channel group can be rerouted into
a different portion of the network.
6800-A2-GB21-10
Configured so that the channel group's route is user-specified, node by node or by
node/logical link. Up to two fixed routes can be configured for each channel group.
The first choice route can be automatic or fixed.
The second choice can be automatic, fixed, or none. However, if the first choice was
automatic, the second choice must be none.
The third choice can be automatic or none. However, if the second choice was
automatic or none, the third choice must be none.
This parameter is automatically set to no for 74x-56K node channel
groups since they are not network compatible.
64 kbps robbed-bit voice
64 kbps clear channel data
56 kbps synchronous data
August 1994
NOTE
Managing Multiplexers
1-35