Total Access 850 System Manual
Section 4 User Interface Guide
64203376L1-1B
© 2004 ADTRAN, Inc.
115
Upon receipt of an OCU latching loopback, the UBR1TE provides a bilateral loopback on the bearer
channel that received the loopback sequence. The other bearer channel is not affected during this loopback.
Upon receipt of a CSU latching loopback sequence in either B1 or B2 channels and the U-interface is in
sync, the UBR1TE issues an EOC loopback request to the NT1 for the appropriate channel. If the
U-interface is not in sync, the UBR1TE sends abnormal station (*0011110) in both B1 and B2 channels.
For a UBR1TE in a CSU latching loopback, receipt of the 35 TIPs will release the test in progress,
following the release code to a UBRITE in a CSU test, the UBR1TE issues a Return-To-Normal EOC
message to the NT1/TA.
I
NTERFACE
(UBR1TE) > T
EST
> B2 T
EST
Initiates a test on the first B channel (B1) of the ISDN circuit. Refer to
Interface (UBR1TE) > Test > B1
Test
on page 113 for more details on available tests.
1. Minimum of 35 transition in progress (TIP) bytes (*0111010).
2. Minimum of 35 LSC bytes: OCU (*1010101), CSU (*0110001).
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)
Summary of Contents for Total Access 850
Page 14: ...Table of Contents Total Access 850 System Manual 14 2004 ADTRAN Inc 64203376L1 1B ...
Page 16: ...Section 1 System Description Total Access 850 System Manual 16 2004 ADTRAN Inc 64203376L1 1B ...
Page 22: ...Section 1 System Description Total Access 850 System Manual 22 2004 ADTRAN Inc 64203376L1 1B ...
Page 224: ...Section 5 DLP 4 Total Access 850 System Manual 224 2004 ADTRAN Inc 64203376L1 1B ...
Page 232: ...Section 5 DLP 6 Total Access 850 System Manual 232 2004 ADTRAN Inc 64203376L1 1B ...
Page 236: ...Section 5 DLP 7 Total Access 850 System Manual 236 2004 ADTRAN Inc 64203376L1 1B ...
Page 244: ...Section 5 DLP 10 Total Access 850 System Manual 244 2004 ADTRAN Inc 64203376L1 1B ...
Page 252: ...Section 5 DLP 13 Total Access 850 System Manual 252 2004 ADTRAN Inc 64203376L1 1B ...
Page 256: ...Section 5 DLP 14 Total Access 850 System Manual 256 2004 ADTRAN Inc 64203376L1 1B ...
Page 264: ...Section 5 DLP 16 Total Access 850 System Manual 264 2004 ADTRAN Inc 64203376L1 1B ...
Page 278: ...Section 6 ADTRAN Utilities Total Access 850 System Manual 278 2004 ADTRAN Inc 64203376L1 1B ...