ADTRAN U-BR1TE Bedienungsanleitung

U-BR1TE

ISDN 2B1Q INTERFACE

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

• UseofD4bankaddsflexibilityandextendslifeofD4

equipment

DESCRIPTION

The ADTRAN U-BR1TE is a device which enables

transport of ISDN Basic Rate (2B+D) information over T

carrierlines. Thisisaccomplishedbytheinsertionofthetwo

"B"channelsat64kbpsandasingle "D"channelat16kbps

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

RemoteTerminallocation(RT). ClearChannelcapabilities

(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

occupiesthetimeslotinwhichitisinserted,andthenexttwo

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

determinewhichnetworkelementistobeloopedback. 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

MechanizedLoopTesting(MLT3.0/ISDN)accordingtoTR-

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).

APPLICATIONS

The ADTRAN U-BR1TE is suitable for use in both

Central Office and customer premises environments. The

use of a single wire pair for full-duplex operations greatly

simplifies the administration of cable plant. The capability

oftheU-interfacetoservemixedwiregauges,andnominal

distances up to 18,000 ft. make it the universal choice for

ISDN deployment.

The ADTRAN U-BR1TE is ideally suited when the

need arises to extend ISDN service beyond the normal

ISDN BR1/8 Bank (BR1/8)

TheADTRANBR1/8BR1TE bankprovidesanalternative

means of housing the ADTRAN U-BR1TE or T-BR1TE and

providesnetworkterminationforaT1line. TheBR1/8contains

eight channel slots to accommodate up to eight U-BR1TEs or

T-BR1TEs. Each channel slot contains three DS0 timeslots

allowing all of the channel slots to be used when delivering

ISDNBasicRate(2B+D)Service. TheBR1/8isaneconomical

means to offer ISDN Basic Rate via T carrier. Mounting slots

areprovidedforeightcommonequipmentcards:aPAU,PCU,

OIU-2, RU, LIU, ACU, TU, and CAU. It is available in 23-inch

mounting.

servicing range. The ability to provide ISDN services

is only limited by the range of available T carrier lines.

In instances where the 2B1Q U-interface card is

not available in the digital switch, it is possible to use

ADTRAN T-BR1TEs and U-BR1TEs in a mixed

application. Thisapplicationallowsthe2B1QT1.601-

1992 U-interface to be delivered from a digital switch

which does not yet support it.

U-BR1TE Applications

LOCAL EXCHANGE

18,000 FT.

LOCAL EXCHANGE

18,000 FT.

D4 (BR 1/8)

U-BR1TE

CHANNEL

BANK

D4 (BR 1/8)

U-BR1TE

CHANNEL

BANK

D4 (BR 1/8)

U-BR1TE

CHANNEL

BANK

D4 (BR 1/8)

U-BR1TE

CHANNEL

BANK

NT1

U

T

I

S

D

N



S

W

I

T

C

Loop Interface:

Line: 2-Wire (TIP and Ring)

Operating Mode: Full-duplex

Data Rate: 160 kbps total; 144 kbps available to customer

Signal Format: 2B1Q

Output Amplitude: 2.5 Volt, Zero-to-Peak

Tx Source Impedance: As per ANSI T1.601-1992

Rx Source Impedance: As per ANSI T1.601-1992

Receiver Sensitivity: As per ANSI T1.601-1992

DS1 Facility Interface: Fully compatible with WECO D4 Channel Bank Equipment

Network Compatibility: ISDN and other digital service, according to TR-NWT-000397

Faceplate Controls and Indicators:

Controls: B1/B2 Bearer channel Select switch

LP/CR Loop or carrier direction Select switch

Select Scrolls through valid loopback addresses on four-character display

Test Activates selected loopback

Indicators: Four-character display is used to select loopback address and display loopback status.

Test: Bantam test jacks for TPI 108/109 RT II or equivalent test sets

Mechanical:

Size: 4.4" H x 10" D x 1.4" W

Weight: 10 oz.

Mounting: Mounts in WECO D4 Channel Bank/SLC-96 terminals

Power: Current Drain On-Card Dissipation

-48 V: 40

A (in LUNT mode) 1.95 W maximum

5V: 5

A Display OFF (normal operating mode)

A Display ON

ORDERING INFORMATION: The part numbers for the U-BR1TE are provided below.

Equipment Part Number

U-BR1TE 1100020L1

U-BR1TE MLT 1100020L2

BR1/8 BR1TE BANK 1150018L1

U-BR1TE SPECIFICATIONS

901 Explorer Boulevard • Huntsville, Alabama • 35806-2807 • (205) 971-8000 • FAX (205) 971-8699

Display Interpretation

ACTV IN PROG Activation in progress, the 2-wire loop is attempting to activate.

LOOP lS DOWN The 2-wire loop is not activated.

ADR# LOOP BACK A distant unit with address # is in a loopback commanded from this card.

NT1 LOOP BACK The NT1 is in loopback as commanded from this card.

B1 LOOP BACK This card is currently looping back channel B1 as commanded from a far unit.

B2 LOOP BACK This card is currently looping back channel B2 as commanded from a far unit.

2B+D LOOP BACK This card is currently looping back all channels as commanded from a far unit.

BANK CR FAIL Bank carrier fail, the channel bank is not receiving data from the T carrier.

XMIT CR SIDE Transmit carrier side, forcing the injection of 64 kbps data into a Bearer channel from the front panel Bantam jack into the carrier direction.

XMIT LP SIDE Transmit loop side, forcing the injection of 64 kbps data into a Bearer channel from the front panel Bantam jack into the loop direction.

MADE B1 LPBK Made B1 loopback, manually forced the Bearer channel B1 loopback in both the network and customer directions.

MADE B2 LPBK Made B2 loopback, manually forced the Bearer channel B2 loopback in both the network and customer directions.

CHCK TEST SET Check test set, ensure test set Tx probe is properly inserted into faceplate Bantam jack and configured as NEAR LOGIC.

FAR END OPEN The unit on the far end of the carrier is not present or not configured properly.

61100.020L1-8C

August 1993

Printed in U.S.A.

Specifications subject to change without notice.

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