ADTRAN D4 U-BR1TE V User Manual

D4 U-BR1TE V w/PWR and DDS Loopbacks

ISDN 2B1Q Interface

Installation and Maintenance

CONTENTS

1. GENERAL .................................................................. 1

2. INSTALLATION ....................................................... 2

3. TESTING .................................................................... 7

4. MAINTENANCE .....................................................13

5. WARRANTY AND CUSTOMER SERVICE .........14

FIGURES

Figure 1. ADTRAN U-BR1TE V ..................................... 1

Figure 2. Backplane Pin Assignments ..............................3

Figure 3. Time Slot Assignments for 2B+D Service in

SLC Mode I w/ D1D Counting .........................3

Figure 4. Time Slots that CANNOT Contain BR1TE

Cards .................................................................. 4

Figure 5. SW1, SW3, and SW6 Labeling.........................4

Figure 6. Position Switch Settings at Network Locations

for ISDN Applications ...................................... 6

Figure 7. U-BR1TE V IDSL/DDS Circuit Diagram ......10

Figure 8. IDSL/DDS Loopback Response ..................... 11

Figure 9. ADTRAN U-BR1TE Bidirectional Loopback .. 12 Figure 10. IDSL/DDS Remote End Initiated Loopback,

Local Loop ...................................................... 12

Figure 11. IDSL/DDS Remote End Initiated Loopback,

Customer Loop ................................................12

Figure 12. IDSL/DDS Trouble Codes ..............................13

Figure 13. DS0 Latching Loopback ................................. 14

TABLES

Table 1. SW1, SW3, and SW6 Option Settings ...............5

Table 2. Rotary Switch Options .......................................7

Table 3. LED Indication ................................................... 7

1. GENERAL

This practice provides installation and maintenance procedures for the ADTRAN D4 U-BR1TE V w/PWR and DDS Loopbacks, P/N 1104020L4. Figure 1 is an illustration of the U-BR1TE V.

ISDN/DDS

The U-BR1TE employs features for both ISDN and DDS transport. ISDN comprises the major functionality and is described in this section. A description of DDS functionality is located in Section 3.

Revision History

Issue 3 of this document includes 2B leased mode operation and revises the CLEI code.

Section 61104020L4-5C

Issue 3, May 2002

CLEI Code: D4C5BENB_ _

U-BR1TE V

D4-UBR1PWR/DDS

1104020L4

SW1

SW3

SW6

ACT

TEST

ERR

Figure 1. ADTRAN U-BR1TE V

Functional Description

The U-BR1TE V is a line card that plugs into a single channel slot of an AT&T D4/SLC®-96 channel bank. It provides an ISDN U-interface and allows the transport of Basic Rate 2B+D information over T1 carriers and twisted pair wiring. The U-BR1TE V combines the functionality of a standard U-BR1TE V and a U-Repeater Powering Module which will simplify the installation of the U-Repeater. Span powering also allows deployment of 2-wire DDS when an IDSL OCU-R is used to terminate the ISDN local loop. This eliminates the need to provide AC power at the customer premises.

The U-BR1TE V is used at both the Central Office Terminal and Remote Terminal locations. Clear channel capability (B8ZS) is not required of the T1 facility if zero byte substitution is enabled. The U-BR1TE V plugs into a single channel slot of the D4 bank, but can require three time slots when transporting 2B+D information. Block error rate performance over the T1 facility is monitored and is available to the network.

AD5

AD6

AD4

OUT (Rx)

(Tx)

CRTXLPBK

LPTX

NT1

AD1

AD2

AD3

TEST

PTRNNORM

L O

G I C

SW2

SW4

SW5

61104020L4-5C

Trademarks: Any brand names and product names included in this document are trademarks, registered trademarks, or trade names of their respective holders.

Section 61104020L4-5, Issue 3

C A U T I O N

Features

The U-BR1TE V features support both ISDN and DDS, plus features common to both as listed here:

ISDN Features

• Span powers U-repeaters with 43 mA @ -28 to

-120 VDC for ISDN applications.

• Internal test pattern allows for testing of individual B Channels without requiring external test equipment.

• Transportation of ISDN Basic Rate 2B+D information over T1 facilities in the 3-DS0 format specified in TR-NWT-000397.

• B1 and B2 loopback addressability at the front panel for the NT1 and up to six devices in the Network-to-Customer direction.

DDS Features

• Span powers an IDSL OCU-R with 12 mA @

-120 VDC for DDS applications.

• Transmit MUX-Out-of-Sync (MOS) trouble code upstream for IDSL loss of signal, loss of sync, or open loop.

• Perform bidirectional loopback (loop and network) when commanded into DS0 DP loopback from the network direction only.

• Initiate in-band OCU loopback to loop the IDSL OCU-R via front panel push button.

• Loopback release in response to TIPs per TR62310 or front panel push button.

• Remap all subsequent DS0 DP loopback codes into respective EOC loopbacks to loop back respective downstream U-Repeaters, TRISDN elements, and U-BR1TES when optioned for 1B+D, or 2B+D.

• Pass OCU loopback code through to loop the IDSL OCU-R.

• Pass CSU loopback code through to loop the CSU/DSU and simultaneously send a remap to the NT1 EOC address.

• Returns Abnormal Station Code (ASC) to the network in B1 during loopback conditions initiated by the IDSL OCU-R.

2B Leased Mode Features

• DDS loopback operation during 2B data mode only.

Common Features

• ISDN 2B1Q interface which meets all Layer 1 requirements as specified in ANSI T1.601-1991.

• 18 kft nominal range on mixed gauge wire.

• All Layer 1 maintenance function and performance monitoring as specified in TR-NWT-000397 and TR-TSY-000829.

• Distinctive metallic DC test signature to identify either line unit LT or line unit NT mode of operation as specified in TR-NWT-0000397.

• Provides loopback capability for full 2B+D as well as individual B channels in both loop and carrier directions. Individual B channel loopbacks may be initiated at the U-BR1TE V front panel or from a remote location through the maintenance channel.

• DS0 logic level transmit and receive data access through front panel bantam jacks.

• A built-in Cyclic Redundancy Check (crc) clock error detector allows for local performance monitoring at the front panel without test equipment.

• Addressing and error status with front panel LED indicators. Test function chosen by a front panel ten-position rotary switch.

The U-BR1TE V is compatible in functionality and is interchangeable with the U-BR1TE III w/PWR (1103020L4) except when used in DDS applications. In addition to being compatible and interchangeable with the just mentioned ADTRAN unit, the U-BR1TE V, adds features in leased mode, including DS0 DP latching loopback and sending Multiplexer-Out-of

-Sync (MOS) toward the network.

2. INSTALLATION

C A U T I O N

SUBJECT TO ELECTROSTATIC DAMAGE

OR DECREASE IN RELIABILITY.

HANDLING PRECAUTIONS REQUIRED.

After unpacking the unit, inspect it for damage. If damage is noted, file a claim with the carrier, then contact ADTRAN. See Warranty and Customer Service.

Physical Requirements

The U-BR1TE V plugs into a single D4/SLC-96 channel slot. The backplane pin assignments are illustrated in Figure 2. When provisioned for basic rate service (2B+D), the U-BR1TE V occupies three time slots. In a D4 or SLC-96 Mode III channel bank, it occupies the time slot associated with the physical channel slot that it occupies plus the next two time slots to the right. The physical channel slots, whose time slots are used in this manner, must remain unoccupied.

2 Section 61104020L4-5, Issue 3 61104020L4-5C

+5V

INCLK

TDATA

RCLK

RWD

RSQ

-48V

GND

In SLC-96 Mode I with D1D counting channel bank,

FRM GND

-12V GND +12V GND TWD TSP TSQ RNPCN

TDCLK NGATE RSP RNDIS

-48R

NSEIZE

T* MCLK

*2B1Q Signal Terminals

the time slots are allocated as shown in Figure 3 with two time slots per physical channel slot.

The unit uses two time slots in one physical slot and a time slot from an adjacent slot when configured for 2B+D operation. When selected for Slot 1, 4, 7, or 10 operation, the unit occupies the two time slots associated with the physical slot in which it resides and the upper time slot of the next adjacent physical slot.

When selected for Slot 2, 5, 8, or 11 operation, the unit occupies the lower time slot of the occupied physical slot and the adjacent two time slots of the next physical slot to the right. When using the Slot 2, 5, 8, 11 option, the physical slot to the right must be left vacant. A unit selected for one or two time slots, B1+D, B2+D, B1, B2, 2B, and D only, occupies only the two time slots associated with the physical slot used. In this configuration, option the unit for Slot 1, 4, 7, or 10.

Figure 2. Backplane Pin Assignments

PS1 PS2 PS3 PS4 PS5 PS6 PS7 PS8 PS9 PS10 PS11 PS12

UTS

LTS

UTS =

NOTE: Unoccupied slots should have blank panels installed to prevent inadvertant use.

C1 =

C2 =

UTS

LTS

upper time slot

physical location of U-BR1TE optioned as "slots 1, 4, 7, 10"

physical location of U-BR1TE optioned as "slots 2, 5, 8, 11"

UTS

LTS

C1 C2 C1 C2 C1 C2

Unoccupied

LTS =

PS =

* =

lower time slot

physical slot (1 physical slot consists of 2 time slots)

Must be empty - time slots are being used by U-BR1TE card in C2

Unoccupied

Figure 3. Time Slot Assignments for 2B+D Service in SLC Mode I w/ D1D Counting

61104020L4-5C

Section 61104020L4-5, Issue 3

See Figure 4 for additional channel slot deployment restrictions for each bank type.

D4 Bank: D4 Channel Counting

SLC-96 Carrier Mode 1 Terminal: D1D Channel Counting

SLC-96 Carrier Mode 3 Terminal: D1D Channel Counting

D4 Bank: D1D Channel Counting, or SLC-96 Carrier Mode 3 Terminal: D4 Channel Counting

1 234 56789101112

13 14 15 16 17 18 19 20 21 22 23 24

1 234 56789101112

1 5 9 1317212 6 10141822

** **

3 7 11 15 19 23 4 8 12 16 20 24

1 234 56789101112

3 7 11 15 19 23 4 8 12 16 20 24

******

1 5 9 1317 21 2 6 10141822

13 14 15 16 17 18 19 20 21 22 23 24

1 234 56789101112

1 3 5 7 9 11 13 15 17 19 21 23

2 4 6 8 10 12 14 16 18 20 22 24

13 14 15 16 17 18 19 20 21 22 23 24

A channel unit with B+D service cannot occupy this slot

A channel unit with 2B+D service cannot occupy this slot

******

****

Physical Slots

Time Slots

Physical Slots

Time Slots

Physical Slots

Time Slots

Physical Slots

Time Slots

Physical Slots

Figure 4. Time Slots that CANNOT Contain

BR1TE Cards

D4 Bank Requirements

The COT D4 bank must be configured with an OIU-2 selected for external timing. The COT bank must be provided with an external composite clock synchronized with the network.

SLC-96 Bank Requirements

The COT SLC-96 bank must be configured with a special service unit (SSU) selected for external timing. The COT SLC-96 bank must be provided with an external composite clock synchronized with the network.

Interface Requirements

The U-BR1TE V unit includes two interfaces. The loop-side interface is an ISDN U-interface which is used to deliver Basic Rate service. The carrier-side interface is a D4/SLC-96 channel bank interface which is used to insert data into the 1.544 Mbps T1 stream. Only the polarity-insensitive T and R leads are used in the cross-connection.

Option Switch Settings

Figure 5 displays the locations for SW1, SW3, and SW6 on the U-BR1TE V. Table 1 contains the option settings for SW1, SW3, and SW6 of the U-BR1TE V.

SW6

NORM

POWER

SW3

LULT(RT)

O N

SW3

LUNT(COT)

SW4

NORM

LULT(RT)

O N

LUNT(COT)

TANDEM

ADJ

TANDEM

ADJ

POWER

TRMB1B2DZBS DIS

23456

1 O N

SW2

ZBS EN

TRMB1B2DZBS DIS

23456

SW1

ZBS EN

Figure 5. SW1, SW3, and SW6 Labeling

4 Section 61104020L4-5, Issue 3 61104020L4-5C

Table 1. SW1, SW3, and SW6 Option Settings

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61104020L4-5C

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Section 61104020L4-5, Issue 3

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