Lucent Technologies 8.2 User Manual

Issue 1

April 2000

Managing data calls 

421

Wideband Switching 

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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.

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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 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:

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High-speed video conferencing

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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 applications involving high-speed data transmission, video 
transmission, or high bandwidth

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.