ADTRAN ISDN 2B1Q manual Features, Benefits, Description, U-BR1TE

U-BR1TE

FEATURES

•Conforms to ANSI T1.601-1992

•Plugs into WECO D4 Channel Bank, ADTRAN BR1/8 BR1TE bank, and ACT 1241

•Designed for use in SLC-96 terminals

•Basic Rate 2B+D service

•Faceplate Bantam jacks for maintenance testing

•TR-NWT-000397 3 DS0 format and T1 facility performance monitoring

•Loopback features available on faceplate

•18,000 ft. nominal range, mixed gauge

•U-BR1TE/MLT supports Mechanized Loop Testing

BENEFITS

•Extends range of 2-wire U-interface using T carrier

•Suitable for both Central Office and customer premises environments

•Use of D4 bank adds flexibility and extends life of D4 equipment

DESCRIPTION

The ADTRAN U-BR1TE is a device which enables transport of ISDN Basic Rate (2B+D) information over T carrier lines. This is accomplished by the insertion of the two "B" channels at 64 kbps and a single "D" channel at 16 kbps into 3 DS0 time slots. The U-BR1TE provides a standard U-interface which operates at 160 kbps full duplex over a single twisted pair of wires. The U-BR1TE may be used at both the Central Office Terminal location (COT) and the Remote Terminal location (RT). Clear Channel capabilities (B8ZS) are not required of the T1 facility if Zero Byte Suppression is enabled. The U-interface available at the U-BR1TE conforms to ANSI standards and performs all Layer 1 functions.

The U-BR1TE plugs into a single D4 channel slot. It occupies the time slot in which it is inserted, and the next two adjacent time slots when delivering 2B+D service. The U-BR1TE meets the ones density requirement of the T carrier through the use of zero byte substitution and associated flags in the “D” channel DS0 slot according to TR-NWT-000397.

Maintenance and testability is provided for on the U-BR1TE's front panel. A four-character display provides an indication of Loop Activation, Out-of-Service, and Test. The Select button is used with the four-character display to determine which network element is to be looped back. The B1-B2 switch determines which channel is to be looped back. The LP-CR switch determines the direction of the loopback. The Test button, which activates the unit's test features, is recessed to prevent any inadvertent operation.

The U-BR1TE/MLT contains the same capabilities as the U-BR1TE, with the addition of compatibility with Mechanized Loop Testing (MLT 3.0/ISDN) according to TR- NWT-000397, Issue 3, June 1992. When configured and installed in a SLC-96 channel bank, the U-BR1TE/MLT allows testing the local loop cable drop using an Extended Pair Gain Tester (XPGTC).