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MultiFRAD User Guide
Changing Channel Parameters (FR221/V2 only)
Click the Voice Channels button on the main menu to display the Voice/Fax Channel Setup dialog
box. The Interface tab is the default tab that appears whenever this dialog box is opened. The other
two tabs contain voice and fax settings and the voice communications Tone Pairs for the MultiFRAD.
Interface
The Interface tab defines the interface type used on each voice/fax channel. The interface group
contains three interfaces with the FXS divided into Ground Start and Loop Start (Loop Start is
common). Use FXS when a telephone or fax machine is connected directly to the back panel of the
MultiFRAD. Use the FXO interface for a station side connection to a telephone switch (PBX). Use
the E&M interface for a trunk connection to a PBX.
Dialing Options and Auto Call options have to be considered for each interface; also, Pulse or DTMF
dialing has to be selected for the FXO interface, and signal, mode, and wink timer (if wink signaling is
used) also have to be considered for the E&M interface. To change a voice channel, you have to
select Channel 1 or Channel 2. If the default interface (FXS) is used, you have to consider the
signaling method (either loop start or ground start) and the Maximum Dial Digits (with a range of 1 to
16 and a default of 5). The value for Max Dial Digits can be increased without affecting the existing
phone directory database. If you increase the value in this field, it merely means that any new phone
numbers that are added to the database can have more than five digits.
FXO Interface
To use an FXO interface, you have to select (in the Regeneration group) the dialing type (pulse or
DTMF; i.e., tone) used by your PBX. To determine the dialing type, contact the person in charge of
your in-house telephone switch (PBX).
E&M Options
To use an E&M interface, you have to consider the dialing options, Auto Call option, signaling, mode,
and if wink signaling is used, the wink timer. The E&M signal options of Dial Tone or Wink are based
on how the E&M trunk on the PBX is configured. The dial tone is the sound you hear when you pick
up the telephone. Wink signaling is part of the handshaking protocol between telecommunications
devices which is a momentary interruption in signal indicating that a distant device is ready to receive
the digits that have just been dialed. To determine which type of signaling to use, contact your in-
house switch personnel. If wink signaling is used, the Wink Timer option becomes active which
specifies in milliseconds the delay in sending address information to the remote MultiFRAD. The wink
timer range is from 100 to 350 milliseconds with a default of 250 ms.
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