Advertisement
5. Upon completion of the test, select another
address using the ten position rotary switch, or
another bearer channel (SW4-1).
6. Upon completion of all testing, press the TEST
pushbutton (SW5) and remove the 91441 test
adapter access jack.
Performance Monitoring of the local T1 carrier system
and 2-wire U-interface of ISDN data can be performed
from the front panel without interruption of service to the
customer. For this test, bearer channel selection is not
applicable and a test pattern source is not required. To
initiate local performance monitoring, perform the
following:
1. Ensure the NORM/PTRN DIP switch is in the
NORM position, and the paddle jack is NOT
installed in the faceplate TX bantam jack.
2. Select ADR1 using the ten-position rotary switch.
3. Depress the recessed TEST push-button to
initiate the test. The TEST LED will illuminate
GREEN.
4. The total number of Near End Block Errors
(NEBE) received are simultaneously displayed
as crc errors with the LP and CR CRC status
LEDs. (See Table D).
5. To exit Local Performance monitoring, depress
the TEST button for two seconds or longer.
Upon deactivation of the test, the TEST LED will
go out.
For leased mode applications, the D channel is typically
disabled on the 9004 U-BR1TE II. Without the D channel,
standard ISDN loopbacks by way of the eoc are not
available across the T1 carrier system. For this situation
the ADTRAN 9004 U-BR1TE II responds to independent
network-issued OCU and CSU latching loopback
sequences for B1 and B2, when configured as
Adjacent-to-Customer.
Enabling OCU latching loopback sequence:
1. Minimum of 35 transition in progress (TIP) bytes
(*0111010).
2. Minimum of 35 OCU loopback select code (LSC)
bytes (*1010101).
3. Minimum of 100 loopback enable (LBE) bytes
(*1010110).
4. Minimum of 32 far-end voice (FEV) bytes
(*1011010).
* Denotes Don't Care bit - either a 1 or a 0.
6
If the 9004 U-BR1TE II detects a CSU latching loopback
sequence in either B1 or B2 service and the U-interface
is in sync, the 9004 U-BR1TE II will issue the
corresponding eoc loopback request to the NT1. If the
U-interface is not in sync, the 9004 U-BR1TE II sends
abnormal station (*0011110) in both services of B1 and
B2.
Enabling CSU latching loopback sequence:
1. Minimum of 35 TIP bytes.
2. Minimum of 35 CSU LSC bytes (*0110001).
3. Minimum of 100 LBE bytes.
4. Minimum of 32 FEV bytes.
* Denotes Don't Care bit - either a 1 or a 0.
Disabling OCU or CSU latching loopback sequence:
1. Minimum of 35 TIP bytes.
The valid front panel tests in leased modes are ADR1,
CRTX, LPTX, and LPBK for all circuit positions. NT1,
ADR1-ADR6 loopback tests are valid for the Adjacent to
Customer circuit position only. ADR2 would be used to
test an ADTRAN U-Repeater deployed from the 9004
U-BR1TE II.
5. SPECIFICATIONS
Refer to Table D for product specifications.
6. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within ten
years from the date of shipment if it does not meet its
published specifications or fails while in service (see
ADTRAN Equipment Warranty, Repair, and Return Policy
and Procedure).
Return Material Authorization (RMA) is required prior to
returning equipment to ADTRAN.
For service, RMA requests, or further information, contact
one of the following numbers:
ADTRAN Technical Support ............. (800) 726-8663
Standard support hours, Monday-Friday, 7am-7pm CST
Emergency Support:, 7 days/week, 24 hours/day
ADTRAN Sales ................................... (800) 827-0807
ADTRAN Repair/RMA ........................ (205) 963-8722
Repair and Return Address
ADTRAN, Inc.
Customer Service Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
Section 61425020L2-5, Issue 1
61425.020L2-5A
Advertisement
