Eicon Networks DIVA T/A ISDN Modem manual Always On / Dynamic Isdn AT Commands

Always On / Dynamic ISDN AT Commands

AT!X6=n	X.25 Maximum Window Size. Specifies the X.25 maximum window size. It is
	sometimes desirable to have a large window size. This is particularly true for satellite
	networks that have significant transmission delays.
	Maximum window size can never be exceeded. If a larger window size is requested
	when the call is established (through X.25 Facilities field), it is negotiated downward
	so that the maximum window size is respected.
	Default: 7.
	Use a value that is greater than or equal to the default window size.
AT!X7=n	X.25 Default Packet Size. Specifies the X.25 default packet size. This packet size is
	used if no packet size is specified in the X.25 facilities field when a call is made.
	Values: 16, 32, 64, 128, 256, 512, 1024, 2048, 4096.
	Default: 128.
AT!X8=n	X.25 Maximum Packet Size. Specifies the X.25 maximum packet size. Maximum
	packet size can never be exceeded. If a larger packet size is requested when the call is
	established, it will be negotiated downward so that the maximum packet size is
	respected.
	Use a value that is greater than or equal to the default packet size.
	Values: 16, 32, 64, 128, 256, 512, 1024, 2048, 4096.
	Default: 256.
AT!X9=n	Terminal Endpoint Identifier (TEI). Specifies the TEI used for X.25 over the
	D-channel. Your service provider assigns this value. Possible values are 0 to 63
	inclusive.
	Default: 21.
AT!X10=n	Delay Before Opening 1st B-channel. Specifies the amount of time (in seconds) the
	throughput on your D-channel must exceed the Opening Threshold (AT!X11=n)
	before the 1st B-channel is added to the AO/DI connection.
	For example, if you specify 5 seconds, and the Opening Threshold is 70%
	(AT!X11=70), once the throughput on the D-channel reaches 70%, there will be a
	delay of 5 seconds before the 1st B-channel is added to the AO/DI connection. If the
	throughput drops below 70% during the 5 seconds, the 1st B-channel will not be
	added to the connection.
	Range: 0 to 65535.
	Default: 5 seconds.
AT!X11=n	1st B-channel Opening Threshold. Specifies the threshold (percentage) that the
	throughput on your D-channel must exceed before the 1st B-channel is added to the
	AO/DI connection.
	Range: 0 to 100.
	Default: 70.
AT!X12=n	1st B-channel Closing Threshold. Specifies the threshold (percentage) that the
	throughput on your B-channel must be below before the 1st B-channel is dropped
	from the AO/DI connection.
	Range: 0 to 100.
	Default: 40.

DIVA T/A ISDN Modem Reference Guide ◆ Page 50