Lucent Technologies Definity Enterprise Communication Server 8.2 User Manual

Issue 1

April 2000

Features and technical reference 

1587

Wideband Switching 

(Not available with Offer B) Wideband Switching provides the ability to dedicate 
2 or more ISDN-PRI B-channels or DS0 endpoints for applications that require 
large bandwidth. It provides high-speed end-to-end connectivity between 
endpoints where dedicated facilities are not economic or appropriate. ISDN-BRI 
trunks do not support wideband switching.

ISDN-PRI (and the emulation of it by Asynchronous Transfer Mode-Circuit 
Emulation Service (ATM-CES)) divides a T1 or E1 trunk into 24 (31 for E1) 
information channels and one signaling channel for standard narrowband 
communication. Certain applications, like video conferencing, require greater 
bandwidth. You can combine several narrowband channels into one wideband 
channel to accommodate the extra bandwidth requirement. DEFINITY ECS 
serves as a gateway to many types of high-bandwidth traffic. Wideband switching 
is also supported by the Expansion Interface (EI) circuit pack and the DS1 
Converter circuit pack (for Center Stage Switching or directly connected port 
networks) and the ATM-EI circuit pack (for Asynchronous Transfer Mode 
connected port networks). ATM-CES supports wideband switching only for 
access, tie, and tandem trunks, not for line-side connections.

Wideband Switching supports:

■

High-speed video conferencing

■

WAN disaster recovery

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Scheduled batch processing (for example, nightly file transfers)

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LAN interconnections and imaging

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Other high bandwidth applications involving high-speed data transmission, 
video transmission, etc. 

The following list shows the required screens you must to set up Wideband 
Switching:

■

Access Endpoint

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PRI Endpoint

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ISDN trunk group

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Route Pattern

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Fiber Link Administration (Optional: refer to the DEFINTY services 
documentation for information about this screen.)