NAL RESEARCH CORPORATION A3LA-RG, General Description Manual

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NAL Research Corporation (451-93156-009A)
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interface connector pin assignments are summarized in Table 1, which is ‘pin-to-pin’ the same as model
A3LA-R, A3LA-RM and A3LA-XG.
Table 1. Pin Assignment for the Multi-Interface Connector.
4.1 RS232 Data Interface (Standard 9-Wire Configuration)
The A3LA-RG supports a standard RS232 data interface to a DTE incorporating hardware handshaking
and flow control. The RS232 data interface comprises of eight standard RS232 data, control and status
signals plus a ground level signal reference as shown in Table 1. This interface allows a connected DTE to
utilize the A3LA-RG’s modem functionality through standard AT and extended sets of AT commands. These
commands are defined in Appendix A. The factory-set baud rate is 19,200 bps and can be changed using the
+IPR command.
Note that the Ring Indicator is used by the A3LA-RG to indicate that a Mobile Terminated SBD (MT-SBD)
message is queued at the gateway. Application developers can monitor this pin and apply appropriate AT
commands to the A3LA-RG to retrieve the MT-SBD message.
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 4.0V – 5.4V or 5.0V – 32.0V 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 2.048MHz audio clock output Digital Audio
13 RX RS232 Receive Data (Output) RS232 Data
14 SIGNAL GND Signal ground, 0V signal reference and return GND
15 MIC_AUD Microphone audio input Analog Audio
16 EXT_B+ External 4.0V – 5.4V or 5.0V – 32.0V DC Power
17 EXT_GND External GND input DC Power
18 DPL_TX Digital Peripheral Link (DPL) data output DPL UART
19 DTR RS232 Data Terminal Ready RS232 Data
20 DPL_RX Digital Peripheral Link (DPL) data input DPL UART
21 DSR RS232 Data Set Ready RS232 Data
22 CTS RS232 Clear To Send RS232 Data
23 SIGNAL GND Signal ground, 0V signal reference and return GND
24 DA_RX PCM digital audio input Digital Audio
25 SIGNAL GND Signal ground, 0V signal reference and return GND