Radio Shack Telephone Interface II - Data Interface

Data Interface
The TELEPHONE INTERFACE II provides an RS-232-C interface via a
standard 2S-pin female D-connector (labeled: DATA I/O). The table
below lists the signals used by the TELEPHONE INTERFACE II.
Outputs: Mark (Off): - 8V
Space (On):
+ lOY
Inputs: Mark (Off): -3 TO -2SV
Space (On): +3 TO +2SV
Pin Connections
Function Signal Direction
2 BA
3 BB
1hlnsmit Data Input to modem
Receive Data Output to computer
S CB
6 CC
7 AB
8 CF
Clear
to Send
(On with
Carrier Detect)
Data Set Ready
(ON with
Carrier Detect)
Signal Ground
Carrier Detect
Output to computer
Output to computer
Output to computer
Output to computer
to