GAI-Tronics 352-101 Handbuch - Seite 10

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Pub. 42004-455B

Model 352-101, 352-102, 352-103, & 352-104 Div. 1 SMART Hazardous Area Telephones Page 10 of 17

PCBA Hardware Configuration

The PCBA hardware configuration options are explained in detail in the following sections and the

necessary jumper settings are identified to enable or disable each option. We recommend reading the

following sections, recording the desired parameters, and then making the necessary changes. We also

recommend that you make a record of your settings. The following options are controlled by specific

hardware configurations. See Figure 7 on page 8 for the jumper locations.

Auto-answer Configuration

Factory Setting: Auto-answer feature enabled

The Auto-answer feature enables or disables the automatic answering of an incoming call, which allows

TMA to monitor the health of this telephone via polling. When the Auto-answer feature is enabled, the

telephone automatically answers the call and attempts to communicate with TMA.

Enable: Place the J14 jumper in position EN.

Disable: Place the J14 jumper in position DIS. (Do not use this setting except under the direction of

GAI-Tronics personnel.)

: The Auto-answer feature must be enabled during remote programming, and to allow the

OTE

GAI-Tronics Telephone Management Application PC to contact the telephone.

Polarity Configuration

Factory Setting: Non-polarity sensitive

This telephone can be configured to be polarity or non-polarity sensitive. With the non-polarized setting,

the telephone operates with the telephone line's positive terminal connected to either the tip or the ring.

With the polarized setting, the telephone only operates with the telephone line's positive terminal

connected to the tip.

Non-polarity Sensitive: Place the J6 jumper in position NON.

Polarity Sensitive: Place the J6 jumper in position POL.

DTMF Gain Select Configuration

Factory Setting: Low Gain selected

Two gain selections are available in the DTMF detection circuit. In most installations, the low gain

setting is recommended. The high gain setting may be necessary if the telephone is not responding to

manual or TMA-generated DTMF commands.

Low Gain Selected: Place the J17 jumper in position LO.

High Gain Selected: Place the J17 jumper in position HI.

Low-Power Mode Configuration

Factory Setting: Low-Power Mode Disabled

For some installations in which only minimal loop current is available, the performance of the telephone

may be improved by enabling this feature. Symptoms of minimal loop current may include low speaker

volume and/or momentary muting of audio. In the majority of applications, however, the low-power

mode should be disabled. The low-power mode is enabled by installing the following three jumpers: J21,

J22, and J23.

Low-Power Mode Enabled: Jumpers installed at J21, J22, and J23.

Low-Power Mode Disabled: Jumpers NOT installed at J21, J22, and J23.

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