Comdial DIGITECH, System Manual

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66-083
SECTION 5
DATA COMMUNICATIONS WITH THE
DIGITAL TELEPHONE SYSTEM
Arrange both station-to-trunk and station-to-station
data communications through the system stations,
using a data device, a modem, and a data switch.
EQUIPMENT REQUIRED
Any data device (such as a VDT or a personal
computer equipped with communications
Any Hayes-compatible modem
A data switch (such as the model PC-787JJ from
Precision Components Telephone, Addison IL,
60
1, telephone: l-708-543-6400)
CONNECTIONS
Refer to Figure 3-l 7, and connect the equipment as
illustrated. Certain digital telephone models include a
headset jack located on the rear housing near the line
jack. This headset jack marking reads
Installing this telephone requires the following
connection changes:
The telephone handset remains connected to the
telephone and left on-hook.
Connect the accessory headset to the handset jack
of the data switch.
Connect the telephone jack of the data switch to the
headset jack of the telephone. Do not connect it to
the the handset jack as illustrated. Make this
connection with the modular cable supplied with the
data switch. Make the modem and data device
connections using cabling specified in the literature
accompanying this equipment.
The data switch has a compatibility control located on
the bottom of the cabinet. Set this control to match
the telephone equipment being used.Change the
settings 2 positions from the specified settings to
provide the quietest data path possible.
Use a flat blade screw driver to set the compatibility
control as follows:
l
With the telephone handset connected to the data
switch as illustrated, set the compatibility control to
position 5.
l
With the accessory headset connected to the data
switch, set the compatibility control to 9.
The data switch has a phase switch located on the
right side of the cabinet.
l
Set this switch to the NORMAL position (toward the
rear of the cabinet).
It is very important to set the telephone volume
control to the minimum level.
COMMUNICATION PROCEDURES
STATION-TO-TRUNK
To make a data transmission to a distant site over a
line,
1. Set data switch to VOICE.
2. Prepare modem and data device for data
communications. Refer to information supplied
with software and equipment.
3 . Press telephone line button and hear dial tone.
4. Set data switch to DATA.
5. Issue dialing command to modem from data device
keyboard.
STATION-TO-STATION
To make a data transmission to another station
equipped and connected as shown in Figure ,
1.
2 .
3 .
4 .
5 .
6.
7 .
Set data switch to VOICE.
Prepare modem and data device for data
communications. Refer to information supplied
with software and equipment.
Press on telephone and hear dial tone.
Dial other station and set up voice call.
Type D on data device keyboard but do not
press ENTER. Ask intercom party to type on
their data device keyboard but do not press
ENTER.
Complete voice conversation, ask intercom party to
set their data switch to DATA and to press ENTER
on their keyboard.
Set data switch to DATA, and press ENTER on
data device keyboard. Modems will automatically
complete data connection.
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