ZETRON 2000 Series Specifications download pdf (Page 92)

Trunk Cards and Connections

92 025-9035AA

2. Remove each trunk card from the Terminal and check that the Matrix plug is in the

E&E position for those trunks that should be set for end-to-end. Refer to Jumper

Matrix Settings on page 87 for more details on the matrix plug.

3. You can test each line by calling into the terminal on each end-to-end telephone

number. The RING light on the trunk will light when the Telco is providing AC

ringing voltage to the line. The ANSWER light will come on (and the RING light

goes out) when the trunk card answers the incoming call. Note that the LOOP LED

and the incandescent lamps on the trunk card are not used in the end-end

configuration and will not light.

Configuring for PABX Operation

Private Branch Exchange (PABX) Tie-Trunk Description (E&M)

A different type of telephone line, similar to a selector-level trunk, is commonly found on

in-plant private branch exchanges (PABX); this trunk is sometimes called an E&M Tie-

Trunk. This type of trunk normally allows the caller to use either Rotary Dial or Touch-

Tone telephones. The caller accesses the Terminal by dialing a short one or two-digit

access code (similar to getting an outside line by dialing “9”), which causes the PABX

controller to draw current through a separate M-lead. The Terminal detects this current

and sends a beep to the caller for the pager access code. As the caller keys or dials the

pager access code, the PABX converts the digits into current pulses on the M-lead (in

some cases, conversion to pulses is not performed and DTMF is sent to the Terminal).

Unlike a normal selector-level trunk, the telephone digits are not a bank of numbers and

pulsing occurs as the PABX forwards the caller’s dialed digits.

Connection to a PABX may be made to the Terminal through either an End-to-End station

extension or a tie-trunk. End-to-End installation is described on page 91, tie-trunk is

described here. Tie-trunk connection is the preferred method of interfacing a paging

Terminal to the telephone system. By dialing a short access code, the caller obtains the

paging function, rather than dialing a full extension number. PABX trunk service

generally provides access from any type of on-premise telephone, rotary, DTMF, or

electronic. The caller does not need a DTMF telephone as in End-to-End overdialing. In

addition, the Terminal is able to detect when the caller disconnects, which speeds through

the call processing to make paging available sooner than on an End-to-End installation.

A brief description of trunk-accessible paging on a PABX is appropriate at this point. A

caller dials a short access code (similar to accessing an outside line) to obtain radio

paging. If the PABX is senderized, the caller can then dial the pager code immediately

following the access code. A senderized PABX can store the caller’s dialed digits and

independently place the telephone call to a calling party. This store-and-forward of the

digits makes easy work for the caller. If the PABX is not senderized, then it repeats the

dialed digits to the Terminal as the caller enters them. On a non-senderized PABX, the

caller must dial the paging access code and wait for the PABX to cut through to the

Terminal, the Terminal to answer, and the Terminal to send a Single Beep to the caller.

1 2 ... 87 88 89 90 91 92 93 94 95 96 97 ... 375 376

No comments

ZETRON 2000 Series Specifications Page 92