Administrator's Guide For Avaya Communication Manager November - Avaya Communication Manager Administrator's Manual

Channel allocation
For standard narrowband communication, ISDN-PRI divides a T1 or E1 trunk as follows:
•
T1 trunks are divided into 23 information channels are 1 signaling channel
•
E1 trunks are divided into 30 information channels, 1 signaling channel, and 1 framing channel
Certain applications, like video conferencing, require greater bandwidth. You can combine several
narrowband channels into one wideband channel to accommodate the extra bandwidth requirement.
Avaya Communication Manager serves as a gateway to many types of high-bandwidth traffic. In
addition, DS1 converters are used for wideband switching at remote locations.
Performed using one of the three allocation algorithms: fixed, flexible, or floating.
•
Fixed allocation — Provides contiguous-channel aggregation. The starting channel is constrained
to a predetermined starting point. (Used only for H0, H11, and H12 calls.)
•
Flexible allocation — Allows a wideband call to occupy non-contiguous positions within a single
T1 or E1 facility (NxDS0).
•
Floating allocation — Enforces contiguous-channel aggregation. The starting channel is not
constrained to a predetermined starting point (NxDS0).
Typical uses
A typical video application uses an ISDN-PRI interface to DS0 1 through 6 of the line-side facility. See
Figure 48, Wideband Switching Video Application,
Administrator's Guide for Avaya Communication Manager
November 2003
on page 444.
Managing Data Calls
Wideband Switching
461