Comtest Networks MTAS-192 METALLIC TEST ACCESS SYSTEM - Manual (Page 55)

CT-IG-MTAS192-2008-v1_8.doc Comtest Networks
MTAS-192
June 2006 Installation Guide 49
Table 22: RJ-21 Pinouts
DSL (Front) LINE/FACILITY (Rear) POTS/EQUIPMENT (Rear)
Port/Pair
Number
Tip Ring Tip Ring Tip Ring
1 26 1 26 1 26 1
2 27 2 27 2 27 2
3 28 3 28 3 28 3
4 29 4 29 4 29 4
5 30 5 30 5 30 5
6 31 6 31 6 31 6
7 32 7 32 7 32 7
8 33 8 33 8 33 8
9 34 9 34 9 34 9
10 35 10 35 10 35 10
11 36 11 36 11 36 11
12 37 12 37 12 37 12
13 38 13 38 13 38 13
14 39 14 39 14 39 14
15 40 15 40 15 40 15
16 41 16 41 16 41 16
17 42 17 42 17 42 17
18 43 18 43 18 43 18
19 44 19 44 19 44 19
20 45 20 45 20 45 20
21 46 21 46 21 46 21
22 47 22 47 22 47 22
23 48 23 48 23 48 23
24 49 24 49 24 49 24
Alarm Cabling
Two female RJ11 jacks on the MTAS backplane correspond to MAJOR and MINOR
audible and visible alarms (normally open contacts).
Table 23: Alarm Cable Pinouts
MAJOR MINOR
Pin No. Alarm Pin No. Alarm
1 1
2
Major Visible Alarm
2
Minor Visible Alarm
3 3
4
Major Audible Alarm
4
Minor Audible Alarm
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