DigiTech C0408 Section Data Communications with Digital Telephone System, Equipment Required

IMI 66-083 lnstall.~tion

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 software)

Any Hayes-compatible modem

A data switch (such as the model PC-787JJ from Precision Components Telephone, Addison IL, 60 IO 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 “HDST”. 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:

•With the telephone handset connected to the data switch as illustrated, set the compatibility control to

position 5.

•With the accessory headset connected to the data switch, set the compatibility control to posItIOn 9.

The data switch has a phase switch located on the right side of the cabinet.

•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 CO/PBX 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,	,

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 ITCM on telephone and hear dial tone.

4 . Dial other station and set up voice call.

5 . Type ATXl D on data device keyboard but do not press ENTER. Ask intercom party to type ATA on their data device keyboard but do not press

ENTER.

6.Complete voice conversation, ask intercom party to set their data switch to DATA and to press ENTER on their keyboard.

7 . Set data switch to DATA, and press ENTER on data device keyboard. Modems will automatically complete data connection.

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