Avaya Communication Manager Administrator's Manual page 463

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.
Administrator's Guide for Avaya Communication Manager
November 2003
Managing Data Calls
Wideband Switching
463