ADTRAN U-BR1TE ISDN 2B1Q User Manual

U-BR1TE

ISDN 2B1Q INTERFACE

FEATURES

U-BR1TE

• 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

BENEFITS

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

• Suitable for both Central Office and customer
premises environments

DESCRIPTION

• 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

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

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 TR­NWT-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).