
SDM-9220/9230 Hardware Installation Guide
9-4
Memotec Inc.
NOTE:
The E&M-PTT interface card does not have an onboard DSP processor.
A DSP module must be purchased separately for voice traffic processing.
For instructions on installing the DSP module, consult the
Hardware Instal-
lation Guide
for your product.
9.2.2
Cable and Connector
Use an RJ-45 cable to connect your equipment to the E&M-PTT interface card. This cable
is a solid wire cable with 8 conductors and RJ-45 plugs (8 pins) at both ends. Up to four
RJ-45 to RJ-45 cables are required for each E&M-PTT interface card.
NOTE:
These cables are provided with the product package.
The following table describes the RJ-45 pinout for an E&M-PTT port.
Pin No.
Usage
Description
1
V
Isolated and current limited voltage source output
(+24V or +48V or -24V or -48V)
2
M
Control Signal In
3
R1
Voice In (Transmit Ring)
4
R
Voice Out (Receive Ring) two-wire connection
5
T
Voice Out (Receive Tip) two-wire connection
6
T1
Voice In (Transmit Tip)
7
E
Control Signal Out
8
G
Ground return of isolated and current limited voltage
source
Table 9-1: RJ-45 pinout for E&M-PTT interface card
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