P0903265
Issue 1.00
M3900 Series Computer Telephony Integration Adapter
The M3900 Series Computer Telephony Integration Adapter (CTIA) provides an interface between M3900 Series
telephones (M3902, M3903, and M3904) and your PC for first party call control applications.
Your PC connects to the CTIA through an RS-232-C serial cable. The CTIA is a small cartridge that fits into either slot in
footstand of the telephone. The CTIA requires that you have an Accessory Connection Module (ACM) installed in your
telephone (See the Accessory Connection Module Installation Guide for more information). Check with your Nortel
Networks distributor for the recommended transformer for use with the M3900 Series cartridge accessories.
Note:
The CTIA is not supported on the Meridian SL-100.
How to install the
CTIA
1. Ensure that an Accessory Connection Module (ACM) is properly installed in your M3900
Series telephone (refer to the ACM Installation Sheet for details).
2. Insert the CTIA accessory cartridge into either the small or large port on the ACM. The
cartridge must be face up with latch on top, as shown above.
3. Connect an RS-232-C serial cable to the PC and the CTIA.
Note:
The RS-232-C serial cable is not included with your CTIA. The cable must have a
male DB25 connector to interface with the CTIA. The other end must be terminated
with a connector that mates with the connector on the back of your computer. Contact
your Nortel Networks distributor for recommended RS-232-C cables.
RS-232-C pin
requirements
Pin
2
3
4
5
6
20
7
Function
TX
RX
RTS
CTS
DSR
DTR
GND
Description
Transmit
Receive
Request to Send
Clear to Send
Data Set Ready
Data Terminal Ready
Ground Signal
Physical
Environment
Temperature range
Relative humidity
0° to 50°C (32° to 104°F).
5% to 95% (non-condensing). At temperatures above 34°C (93°F)
relative humidity limited to 53 mbar of water vapor pressure.
Storage
Temperature range
Relative humidity
–50° to 70°C (–58° to 158°F).
5% to 95% (non-condensing). At temperatures above 34°C (93°F)
relative humidity limited to 53 mbar of water vapor pressure.
553-9154
RS232C
Latch
