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Cable and Connector Descriptions
This chapter illustrates and describes the cables and connectors related to
the MultiModemManager rack. These cables can be purchased from
Multi-Tech Systems, any of its distributors, or from any cable manufacturer.
RJ11 is readily available or may be purchased from Multi-Tech.
3.1
Standard DB25 Phone Line Interface Connector Panel
The standard back panel phone line interface provides 16 DB25 male
connections. The following diagram is typical for each of the 16 phone line
connectors.
13
12
RTP-A
11
TTIP-A
10
MI-A
9
TIP-A
8
RTIP-B
7
TTIP-B
6
MI-B
5
TIP-B
4
RTIP-C
3
TTIP-C
2
MIC-C
1
TIP-C
The connector on the back of the rack; the cable connector is female.
We offer the CA 1432MR cable to meet these requirements. Please see the
following page for full information.
25
RRING-A
24
TRING-A
23
MIC-A
22
RING-A
21
RRING-B
20
TRING-B
19
MIC-B
18
RING-B
17
RRING-C
16
TRING-C
15
MIC-C
14
RING-C
DB25-P Male Connector
Modem A
TIP-A
Ring-A
Dial-up line
TTIP-A
Two-wire leased line
TRING-A
or transmit pair of
four-wire leased line
RTIP-A
Receive pair of
PRING-A
four-wire leased line
MI-A
MI/MIC
MI-A
(Special order)
For MT1432MRK:
TIP-A
-
Line B
RING
-
Line A
MI-A
-
Shunt wire
Modem B
(Same as above, except
substitute "B" for "A")
Modem C
(Same as above, except
substitute "C" for "A")
3 - 1
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