ZETRON 2000 Series Spezifikationen PDF herunterladen (Seite 83)

Adjustment Procedures

touch-tone telephone. Be sure to hang up, otherwise spurious noise and telephone line

loading will change the sounds of the “clicks.” Start dialing digits while adjusting the

appropriate level pot on the dial click card (see chart below). Start at the fully counter-

clockwise position and turn clockwise until the light on the dial click card blinks

consistently with each dial click. (Actually, it blinks twice for each click).

Deviations from this point are sometime necessary. Experimenting helps to determine the

optimum adjustment. Usually the level pot should be about midrange.

The adjustment points for the trunk cards and dial click cards are listed in Table 4.

Table 4: Trunk Card and Dial Click Card Adjustment

Contact the Zetron Technical Support at (425) 820-6363 if you are having trouble with

unreliable dial click detection. We can offer additional tips and suggest various solutions.

In extreme cases, we can use special software that requires users to “calibrate” each call

by dialing 1-0 before the page so we can “know” the click pattern for that telephone and

call.

MF Decoder Option

MF (Multi Frequency) is a dual-tone signaling method that is very similar to the common

Touch-Tone DTMF (Dual Tone Multi Frequency) in that it uses two tones, but the tones

are different frequencies (see Theory of Operation section for details).

The MF option board attaches to the dual trunk (rev. E or later) to decode these tones.

Essentially, it provides a specialized tone decoder chip for each half of the Dual trunk.

The MF board is plugged into the existing connector J6 on the Dual Trunk card, and is

secured and supported by a standoff.

There are no adjustments on the MF card. Jumper JP1 is used only for production testing

of MF tone generation.

Alarm Option

The Alarm Monitoring option requires that each Dual Trunk that might receive calls from

alarm dialers be equipped with additional RAM and the Dual Alarm Receiver option

board.

Trunk Card Dial Click Card Adjustment Pot(s)

Single - 702-9037 Single - 702-9010 R20 (R18 is factory set)

Dual - 702-9117 Dual - 702-9119 R6 = trunk A, R28 = trunk B

Note There are also software adjustments for the Dual Dial Click card.

Refer to the System Configuration Files section, or ask Zetron for

assistance.

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ZETRON 2000 Series Spezifikationen Seite 83