2.2.4.3 Connecting MP-124 to FXS Interface
The MP-124 interfaces with the analog telephone interfaces by connecting to a main
distribution frame (MDF), using a 50-pin Telco cable.
MP-124 Safety Notice
To protect against electrical shock and fire, use a 26 AWG min wire to connect
analog FXS lines to the 50-pin Telco connector.
Warning: To reduce noise interference, use a twisted pair Octopus cable that is
terminated on a metal-hooded 50-pin Telco connector.
To connect MP-124 to the FXS telephone interface:
1. Wire the 50-pin Telco connectors according to the pinouts in the table below:
Table 2-7: Pin Allocations of the 50-pin Telco Connector
Phone Channel Connector Pins Phone Channel Connector Pins
1/26
1
13/38
13
2/27
2
14/39
14
3/28
3
15/40
15
4/29
4
16/41
16
5/30
5
17/42
17
6/31
6
18/43
18
7/32
7
19/44
19
8/33
8
20/45
20
9/34
9
21/46
21
10/35
10
22/47
22
11/36
11
23/48
23
12/37
12
24/49
24
Figure 2-20: 50-pin Telco Connector (MP-124/FXS only)
2. Attach each pair of wires from a 25-pair Octopus cable (not supplied) to its
corresponding socket on the MDF adaptor block’s rear panel.
3. Connect the wire-pairs at the other end of the cable to a male 50-pin Telco connector
(not supplied).
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