Multi-Tech Systems MTA128ST-USB - Manual (Page 48)

48
MultiModemISDN User Guide
MTA128ST-USB
S-Register: S50
Function:
Caller Line ID (CLI)
Unit: Decimal ASCII code
Range: 0 or 1
Default: 1 (enabled)
Description: Sets whether the mechanism for identifying two endpoints of a connection is
enabled or disabled. Since RING messages only appear for ISDN data calls,
the CLI feature does not define a means of conveying Calling Party
information to the terminal for ISDN voice calls. CLI information is included
only with the first RING message for a given incoming call and appears as:
RING
FM: 5552000 TO: 5551000
If the Calling Party Number information is not included in the incoming
SETUP message, the RING message appears as follows:
RING
TO: 5551000
If the Called Party Number information is not included in the incoming
SETUP message, the RING message appears as follows:
RING
FM: 5552000
If neither the Called Party Number nor Calling Party Number is included in
the incoming SETUP message, the RING message contains no additional
information.
S-Register: S51
Function:
POTS Port Dial Tone Suppression
Unit: Decimal ASCII code
Range: n = 0, 1
Default: 0
Description: S51 only affects NET3 switch type and voice/modem/fax calls attempted on
the POTS port. Some NET3 switches have a hot dial tone (dial tone that
sounds very loud). If the dial tone is too loud, the TA cannot recognize any or
most of the DTMF digits. This is a similar to trying to communicate with
another person in a very loud train station—your voice is drowned out by the
noise of other people and the trains. By setting S51=1, the TA keeps the
receive gain of the POTS port low until a DTMF digit is received. After a
DTMF digit is received, the gain is set back to whatever !RXG was set to
before the phone, modem, or fax went off-hook (!RXG6 by default). !RXG
does not need to be adjusted.
S-Register: S52
Function:
Auto-Protocol Detection
Unit: Decimal ASCII code
Range: 0 or 1
Default: 1
Description: Enables or disables the mechanism for identifying V.110, V.120, X.75, or
MLPPP operation and is applicable for an ISDN data call. The TA determines
the protocol used from information conveyed by the SETUP message and
activates the indicated protocol. Default setting (1) enables Auto-Protocol
Detection function.