Troubleshooting guide

MX2820 System Manual
5-84 61186003L1-1D
Figure 5-50. MX2820 M13 MUX Loopbacks Menu - For P/N 1186002L3 Only
T1/E1 LOOPBACKS
Performing a loopback test on a T1 or E1 requires selecting an option from 1 to 28 from the
Loopbacks menu screen. Figure 5-51 shows an example for option 1 which selects the T1 #1.
Figure 5-51. T1/E1 Loopbacks Menu (Slot 1A, T1 #1) Example
Shelf: 1 Slot: 1A ADTRAN MX2820 System 04/13/04 16:49
Unacknowledged Alarms: None TID: HTVLALEXD16
MX2820 Loopbacks
T1/E1 Loopbacks T1/E1 Loopbacks DS3/DS2 Loopbacks
1 - Data Mode 15 - Data Mode 29 - DS3 = Data Mode
2 - Data Mode 16 - Data Mode 30 - DS2 #1 = Data Mode
3 - Data Mode 17 - Data Mode 31 - DS2 #2 = Data Mode
4 - Data Mode 18 - Data Mode 32 - DS2 #3 = Data Mode
5 - Data Mode 19 - Data Mode 33 - DS2 #4 = Data Mode
6 - Data Mode 20 - Data Mode 34 - DS2 #5 = Data Mode
7 - Data Mode 21 - Data Mode 35 - DS2 #6 = Data Mode
8 - Data Mode 22 - Data Mode 36 - DS2 #7 = Data Mode
9 - Data Mode 23 - Data Mode
10 - Data Mode 24 - Data Mode 37 - Reset ALL tests
11 - Data Mode 25 - Data Mode 38 - Pattern = QRSS
12 - Data Mode 26 - Data Mode
13 - Data Mode 27 - Data Mode 39 - Select Mult T1/E1 Loopbacks
14 - Data Mode 28 - Data Mode
Selection: '?' - System Help Screen
Shelf: 1 Slot: 1A ADTRAN MX2820 System 04/13/04 17:00
Unacknowledged Alarms: None TID: HTVLALEXD16
T1/E1 Loopbacks
T1 #1: Data Mode
Low-Speed Loopbacks High-Speed Loopbacks
1 - Data Mode 7 - LS CSU Loopback 12 - HS CSU Loopback
2 - Tributary 8 - LS CSU LB w/BERT 13 - HS CSU LB w/BERT
3 - Analog Network 9 - LS NIU Loopback 14 - HS NIU Loopback
4 - Digital Line/Net 10 - LS NIU LB w/BERT 15 - HS NIU LB w/BERT
5 - CODEC Line/Net 11 - LS Line BERT 16 - HS Line BERT
6 - Remote Loopback
Selection: '?' - System Help Screen