iPECS-MG Hardware Description and Installation Manual
Issue 1.1
DECT INSTALLATION
August, 2010
64
5.6 Serial to Audio Cable Specification
Several board types include a serial port presented as an Audio jack. This serial port is not required
for normal operation, it is only used for advanced diagnostics. Boards that include the Audio Serial
connector are PRIB, BRIB2/ BRIB4, AAIB/VMIB, VOIB, and WTIB.
Figure 5.6-1 Audio Jack, Serial Specification
5.6.1 Serial to Audio Cable Wiring
Connection to the Serial port through the Audio connector is made with a Serial to Audio cable. The
cable should be terminated on one end with a DB9 RS-232 connector and on the other end with an
audio jack. The three (3) wires of the audio jack are wired to the DB9 as follows.
wire the Tip conductor of the Audio jack to pin 2 of the DB9
wire the Ring conductor of the Audio jack to pin 3 of the DB9
wire the Grd conductor of the Audio jack to pin 5 of the DB9
Figure 5.6.1-1 Audio to Serial Cable
Tip
Middle
Base
Data Set Ready
Data Carrier detect
