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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Managing data calls
426Wideband Switching
15
Guidelines and examples
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
Data backup connection
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
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.
Primary data connectivity
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.