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Table C-8. Cable pinouts for the 25-48 POTS connector (continued)
Pin
22
23
24
25
T1 and E1 connector and cable specifications
T1 and E1 connectors on a Stinger MRT have RJ-48 female connectors that accept
RJ-48 male plugs. Several type of T1 and E1 cables and connectors can connect the
unit to WAN hardware.
T1 and E1 connector specifications
T1 and E1 WAN interfaces for the Stinger MRT are supported by the female RJ-48
connectors on the T1 and E1 trunk modules. Table C-9 lists the pins assignments for
the active pins on these connectors. The remaining pins are not connected.
Table C-9. Transmit and receive pins assignments for T1 and E1 trunk module connectors
RJ-48 female connector
Pin 1
Pin 2
Pin 4
Pin 5
T1 and E1 cable specifications
Use only cables specifically constructed for transmission of T1 or E1 signals. The
cables must meet standard T1 or E1 attenuation and transmission requirements. The
following specifications are recommended:
100ohm (T1) or 120ohm (E1) resistance
Two twisted pairs, Category 3 or better
The WAN interface cables and plugs described in the following sections are supported
for the Stinger MRT T1 and E1 WAN interfaces.
Stinger® MRT Getting Started Guide
Signal
Color code
NC
Orange/violet
NC
Green/violet
NC
Brown/violet
NC
N/A
Cables and Connectors
T1 and E1 connector and cable specifications
Pin
Signal
47
NC
48
NC
49
NC
50
NC
Signal
Receive from the T1 network — Ring
Receive from the T1 network — Tip
Transmit toward the T1 network — Ring
Transmit toward the T1 network — Tip
Color code
Violet/orange
Violet/green
Violet/brown
N/A
C-9
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