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Chapter 3: CallFinder Server Installation

Multi-Tech Systems, Inc. CF220-DID CallFinder User Guide 32

PBX Extension Line Parameters

Dial Prefix: This is an access digit (or digits) needed to access an outside line on the PBX.

Extension Port: default = FXO (this prevents damage from wrongly applied battery

and ring voltages)

Set as FXO when the CallFinder is to be connected to a PBX station port (a port that is

normally connected to a normal analog telephone).

Set as FXS when the CallFinder is to be connected to a PBX trunk port (a port that would

normally be connected to an ordinary POTS phone line from the telco central office).

Set as FXS Pass Through when you want to connect the port to a FaxFinder server or other

device. When set to FXS-Pass-Through, the CallFinder simply conveys the DTMF digits

received from the DID line to the extension port. This mode differs from the standard FXS

mode in that it does not compare the incoming DID number to an entry in the Phone Book

in order to find a new number to dial on the extension port. Instead, it simply dials the

same number on the extension port that it received from the DID line.

Auto Attendant Delay: The Auto Attendant Delay value, x, determines how long the

CallFinder will pause before dialing on the PBX.

If the CallFinder channel is configured as an FXS port OR FXS-Pass-Through, it will ring the

PBX and wait x seconds before dialing the proper extension after the PBX seizes the line.

Set x in the range of 1 to 5 seconds.

If the CallFinder channel is configured as an FXO port, x is the length of time that the

CallFinder will wait before dialing after the CallFinder itself has seized the line from the

PBX. Set x in the range of 1 to 5 seconds.

Do not set this parameter to 0. A setting of zero may cause the PBX to miss dialed digits.

EXT Transmit Gain: This is the setting for the amplification factor (in dB) on the PBX

extension. The default value is 5 dB and, in general, this should be the correct level.

This parameter has a range of -6 to 6 dB. Alter the value only if the voice level as heard

by the party receiving the call is unacceptable.

c. Click Update.

d. Click on Current Status. Watch the Current Status: Channel-1/Channel-2 portion of the screen.

The “State” of each DID Modem should be “IDLE.”

10. Connecting CallFinder to PBX or other device

Now that the Extension Ports have been configured (as FXS or FXO) you can connect the cables

between the CallFinder’s Channel 1 and Channel 2 connectors and the appropriate PBX port.

Remember:

(a) to connect a CallFinder channel to a PBX trunk port, the channel must be set to FXS;

(b) to connect a CallFinder channel to a PBX station port, the channel must be set to FXO;

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Multitech CF220 Guía de usuario Pagina 32