AC International MTA128ST-USB manual S53, S54, S17, S18

MultiModemISDN User Guide

n=0	Disable
n=1	Detect
n=2	Detect and Select

Note: V.110 support is available in build MTA128ST-USB only.

S-Register:	S53
Function: Maximum X.75 Buffer Size
Unit:	1 byte
Range:	n=64 - 2048
Default:	2048 (bytes)
Description:S53 allows the maximum buffer size of an X.75 frame to be customized.
	Typically a smaller frame size is more compatible with software packages on
	a PC (such as HyperTerminal). Larger frame sizes introduce larger delay
	which some software cannot deal with appropriately.

S-register:	S54
Function: Force 56 Kbps B-Channel Data Rate
Unit:	Decimal ASCII code
Range:	n=56 (Kbps) or 64 (Kbps)
Default:	64 (Kbps)

Description: S54 can be used to force a 56 Kbps B-channel data rate in order to make 56 Kbps data calls.

S-Register: S55

Function: POTS Port Call Control

Unit:	Decimal ASCII code
Range:	1, 2, 17, 18
Default:	1

Description:Allows you to set the type of information transfer capability for calls placed from the

	POTS port either by a telephone, modem, or fax. Some Central Office (CO) switches
	keep track of the type of line each customer has, and if that line is labeled as a data line
	(modem or fax), it will not accept a speech call originated on that line. However, 3.1 kHz
	audio information transfer capability is allowed on data lines (modem or fax) by most
	switches. S55 also lets you define whether a progress indicator information element
	(which indicates that the origination address of the POTS call is non-ISDN) is sent with
	the SETUP message for the POTS port call. This may help POTS port calls get through
	certain CO switches.
	S1	Speech, no progress indicator
	S2	3.1 kHz Audio, no progress indicator
	S17	Speech, origination address is non-ISDN
	S18	3.1 kHz Audio, origination address is non-ISDN
S-register:	S56 (applies to NET3 [!C0=2] switch type only)
Function:	Calling Party Number IE Settings
Unit:	decimal ASCII code
Range:	128	Disable
	Type of Number
	0	Unknown,
	16	International
	32	National
	48	Network specific

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