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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Managing data calls
421Wideband Switching
15
■ Do not use telephones with data modules with the PC Interface. (You can
still use 3270 Data Modules if you also use 3270 emulation). If you attach a
DCP data module or ISDN data module to a telephone that is connected to
a PC Interface card, the data module is bypassed (not used). All the
interface functions are performed by the interface card even if a data
module is present.
■ The 7404D telephone with messaging cartridge cannot be used with PC
Interface. However, the 7404D with PC cartridge can be used, but only with
Group 1 configurations.
Wideband Switching
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 communication between endpoints where
dedicated facilities are not economic or appropriate. ISDN-BRI trunks do not
support wideband switching.
Wideband Switching supports:
■ High-speed video conferencing
■ WAN disaster recovery
■ Scheduled batch processing (for example, nightly file transfers)
■ LAN interconnections and imaging
■ Other applications involving high-speed data transmission, video
transmission, or high bandwidth
Detailed description
ISDN-PRI divides a T1 or E1 trunk into 24 (32 for E1) channels, where one
channel is used for signaling, and all others 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. In addition, DS1
Converter circuit packs are used for wideband switching at DS1 remote EPN
locations. They are compatible with both a 24-channel T1 and 32-channel E1
facility (transmission equipment). They support circuit-switched wideband
connections (NxDS0) and a 192 Kbps packet channel.