Pin Pin Name Definition
--- -------- ----------
1 /Modem_Power System power status
2 Ground Ground
3 /RTS Request to send
4 /DCD Data Carrier Detect
5 RxD Receive data
6 /CTS Clear to send
7 Modem_sound Analog sound output
8 TxD Transmit data
9 /RI_EXT Ring indicator
10 -5 VDC Power (switchable)
11 +5 VDC Power (unswitched)
12 /DTR Data terminal ready
13 V1 Sound volume control bit (Least significant)
14 V3 Sound volume control bit (Most significant)
15 V2 Sound volume control bit (Middle significant)
16 /Modem_Ins Modem installed
17 /Modem_Busy Modem busy
18 MS_Enable Modem sound enable
Data Access Arrangement (DAA) Interface: Mini-DIN8 connector
Pin Definiton
--- --------
1 Ring Indicator to modem board
2 Clock for reading data from modem board
3 Command 2 (Relay) from modem board
4 Ground
5 Data Read (Country code) to modem board
6 Command 1 (Relay or Data Enable) from modem board
7 + 5 VDC
8 Receive/Transmit Analog signal line
Shell Chassis ground
Article Change History:
23 Jun 1994 - Reviewed for technical accuracy, title changed to more accurately
reflect content of article.
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