Managing Data Calls
Wideband Switching
Administrator’s Guide for Avaya Communication Manager
463
November 2003
PRI-endpoints
A PRI-endpoint (PE) is a combination of DS0 B-channels on a line-side ISDN-PRI facility that has been
assigned an extension.
A PRI-endpoint can support calls of lower bandwidth. In other words, a PE having a width 6 (six DS0s)
can handle a call of one channel (64 Kbps) up to an including 6 channels. For example, an endpoint
application connected to a PE defined as using B-channels 1 through 6 of an ISDN-PRI facility could
originate a call using B-channels 1, 3, and 5 successfully. If the PE has been administered to use flexible
channel allocation, the algorithm for offering a call to the PE starts from the first DS0 administered to the
PE. Since only one active call is permitted on a PE, contiguous B-channels always are selected unless one
or more B-channels are not in service.
One facility can support multiple separate and distinct PRI-endpoints (several extensions) within a single
facility. Non-overlapping contiguous sets of DS0s (B-channels) are associated with each PE.
Universal digital signaling level 1 circuit pack
The UDS1 circuit pack is the interface for line-side and network facilities carrying wideband calls.
Non-signaling configuration
Wideband also can support configurations using non-signaling (non-ISDN-PRI) line-side T1 or E1
connections. The endpoints are the same as those defined for configurations with signaling.
Data service unit/channel service unit
This unit simply passes the call to the endpoint application. Unlike terminal adapters, the DSU/CSU does
not have signaling capability.
NOTE:
No DSU/CSU is needed if the endpoint application has a fractional T1 interface.
Line-side (T1 or E1) facility
This facility, like the ISDN-PRI facility, is composed of a group of DS0s (24 for a T1 facility and 32 for
an E1 facility; both T1 and E1 use 2 channels for signaling purposes). Line-side facilities are controlled
solely from the server or media server. Through the access-endpoint command, a specific DS0 or group
of DS0s is assigned an extension. This individual DS0 or group, along with the extension, is known as a
Wideband Access Endpoint (
WAE
).
Wideband access endpoint
WAEs have no signaling interface to the server or media server. These endpoints simply transmit and
receive wideband data when the connection is active.
NOTE:
Communication Manager can determine if the connection is active, but this doesn’t
necessarily mean that data is actually coming across the connection.