Comdial DIGITECH System Manual Download

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66-083

LINE CONNECTIONS

The line terminations for the common equipment
cabinet are standard modular plug/jack connections.

Each modular’jack provides termination for two lines.
Modular line jacks 1 and 2 also provide termination for

an auxiliary pair in addition to the two outside lines.
The outside line termination can be a type
connector block or individual 6-position modular jacks.
The line cord that is routed between the outside line

termination and the common equipment termination

should be twisted-pair wiring. Table 3-1 shows the
line connection details for all three of the common
equipment base units. Figure 3-4 illustrates typical
line connections.

Transient voltage spikes, if induced onto CO or

lines, can travel through the cable and into

the common equipment. The telephone company

offers basic protection against this condition but it is
usually designed to protect the central off ice circuits.
While it will also provide some protection to the
common equipment, it should not be relied upon for

total protection. To help ensure that external

overvoltage surges do not damage the system, it is
recommended that gas discharge tubes, or similar
primary protection devices, be installed and properly
grounded on all lines.

The outside line that is initially connected to a

particular line port along with all programmed
attributes, can be reassigned to a different port by
programming action. This feature allows adds, moves,
and changes to be made without relocating the line
wiring. Refer to Chapter 4, page 4-19 for line to line
port re-assignment.

Add-on expansion modules are available to expand
line capacity. Refer to Section 3 for complete details.

STATION CONNECTIONS

The system supports the operation of the following

digital station types:

Comdial Digital Multiline Telephone

Comdial Digital LCD Speakerphone

Connections between the common equipment and the
stations are typically via type

connector

which are cable connected to the common

male connector. The connector block is, in

turn, wired to modular jacks which the stations
connect to through the line cord. The maximum
distance allowed from the common equipment to the

stations is 1000 feet using

gauge, twisted-pair

cable.

If spare conductors exist in the cables that are run

between the

connector blocks and the station

jacks, it is a good practice to connect them to earth
ground. as a preventative measure against radio

frequency and/or AC interference.

Only one station should be connected to a station port.

Do not bridge two stations to a single modular jack.

Table 3-2 shows the station connection details.

Figure 3-5 illustrates typical station connections.

The extension number and all other programmable
attributes of a station that are initially assigned to a
particular port can be re-assigned to a different port by
programming action. This feature allows adds, moves
and changes to be made without re-locating the

station wiring. Refer to the automatic station relocation

programming procedure found on page 4-10 and the

station-to-station programming procedure found on
page 4-50.

NOTE:

The

station

assignment

can nor be relocated.

Add-on expansion modules are available to expand
station capacity. Refer to Section 3 for complete
details.

CABLE CLIPS

Each cabinet-mounted

male connector is

equipped with a retaining clip. This clip is designed to
secure the mated connection once it is made. The clip
does this by snapping into a slot on the cable-mounted
connector when it is pressed together with the
cabinet-mounted connector. This retaining clip must
be pulled back slightly to unsnap it before the
connectors can be separated.

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