A3LA-RG Guide Version B
Document Number: 451-93156-009B
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2
M
ULTI
-
INTERFACE
C
ONNECTOR
The multi-interface connector is a male 25-pin miniature D-sub type ( see
that
includes five interfaces—RS232, DC input power, ON/OFF control line, analog audio, and Digital
Peripheral Link (DPL). The multi-interface connector pin assignments are summarized in Table
1, which is ‘pin-to-pin’ the same as models A3LA-R, A3LA-RM, and A3LA-XG.
Figure 2: Multi-Interface Connector
Table 1: Pin Assignment for the Multi-interface Connector
Pin #
Signal
Description
Interface
1
EXT_ON_OFF
Power on/off control input
DC Power
2
+12VDC
Output Voltage to Power the DPL Handset
DC Power
3
EXT_GND
External GND input
DC Power
4
EXT_B+
External 4.0 V – 5.4 V or 5.0 V – 32.0 V
DC Power
5
SPKR_AUD
Speaker audio output
Analog Audio
6
DA_TX
PCM digital audio output
Digital Audio
7
RI
RS232 Ring Indicate
RS232 Data
8
RTS
RS232 Request To Send
RS232 Data
9
TX
RS232 Transmit Data (Input)
RS232 Data
10
DCD
RS232 Data Carrier Detect
RS232 Data
11
DA_FS
PCM digital audio frame sync output
Digital Audio
12
DA_CLK
PCM digital 2.048 MHz audio clock output
Digital Audio
13
RX
RS232 Receive Data (Output)
RS232 Data
14
SIGNAL GND Signal ground, 0 V signal reference and return
GND
15
MIC_AUD
Microphone audio input
Analog Audio