Lucent Technologies 8.2 User Manual

Issue 1

April 2000

Managing data calls 

426

Wideband Switching 

This section examines wideband and its components in relation to the following 
specific customer usage scenarios:

■

Data backup connection

■

Scheduled batch processing

■

Primary data connectivity

■

Networking

Using wideband for data transmission backup provides customers with alternate 
transmission paths for critical data in the event of primary transmission path 
failure.

Scheduled batch processing applications are used for periodic database updates 
(for example, retail inventory) or distributions (for example, airline fare 
schedules). These updates are primarily done after business hours and are often 
referred to as nightly file transfers. Wideband meets the high bandwidth 
requirements at low cost for scheduled batch processing. In addition, wideband 
allows the dedicated-access bandwidth for busy-hour switch traffic to be used for 
these applications after business hours; no additional bandwidth costs are 
incurred.

The non-ISDN backup data connection is also appropriate for scheduled batch 
processing applications. Administered Connections are used to schedule daily or 
weekly sessions originating from this application.

Permanent data connections (those always active during business hours), such as 
interconnections between LANs, are well suited for DEFINITY ECS when 
ISDN-PRI endpoints are used. The ISDN end-to-end monitoring and the 
endpoint’s ability to react to failures provide for critical data availability needs. 
With ISDN, endpoints can detect network failures and initiate backup connections 
through the switch; ISDN endpoints can also establish additional calls when extra 
bandwidth is needed.

Any failures not automatically restored by DEFINITY ECS are signaled to the 
endpoint application, which can initiate backup data connections over the same 
PRI endpoint. DEFINITY ECS routes the backup data connections over alternate 
facilities if necessary.