AC International MTA128ST-USB manual D3=0-63, D3=240, D3=241, DN=1, DN=2

Chapter 4 - AT Commands, S-Registers, and Result Codes

Command: !D3=n

Function: SAPI-0 Data TEI

Values:	n = 0–63, 240 (auto), 241 (disable)
Default:	!D3=240 (Auto TEI)

Description:Use !D3= to set the terminal endpoint identifier (TEI) for the data channel. A

	TEI is a number used by the central office switch to identify uniquely each
	device connected to the network. When it uses dynamic TEI assignments
	(auto TEI), the central office switch assigns a TEI each time the TA connects
	to the network. However, the ISDN service provider may assign a fixed TEI
	at subscription time, in which case you must configure the TA with the fixed
	TEI number. You also can use !D3= to disable the data channel, which may
	be useful when multiple TAs are attached to a network terminator bus.
	!D3=0–63	Sets TEI to a fixed value from 0–63
	!D3=240	Sets data channel for dynamic TEI negotiation
	!D3=241	Disables TEI
Command: *!D3=n
Function:	SAPI-0 Voice TEI
Values:	n = 0–63, 240 (auto), 241 (disable)
Default:	*!D3=240 (Auto TEI)
Description:Use *!D3= to set the TA’s terminal endpoint identifier (TEI) for the voice
	channel. See the !D3= command description.
	*!D3=0–63	Sets TEI to a fixed value from 0–63
	*!D3=240	Sets voice channel for dynamic TEI negotiation (default)
	*!D3=241	Disables TEI
Command: !DN=n
Function:	Disable Data DN/MSN
Values:	n = 1 or 2
Default:	All ports are enabled.

Description:!DNn disables a Data DN/MSN which disables the associated TA port from

	receiving any data calls. However, the port will still be able to originate data
	calls. This is useful for applications where a specific port is for dial-out only.
	Since the TA has only one serial port, both Data DN/MSN 1 and 2 would
	have to be disabled to not accept a call. Disabling only one of the Data DN/
	MSNs will cause the TA to not accept bonded calls (ML-PPP or Softbonding).
	!DN=1	Disables Data DN/MSN 1
	!DN=2	Disables Data DN/MSN 2
Command: *!DN=n
Function:	Disable Voice DN/MSN
Values:	n = 1
Default:	All ports are enabled.

Description:*!DNn disables a Voice DN/MSN which disables the associated TA port from receiving any voice calls. However, the port will still be able to originate voice calls. This is useful for applications where a specific port is for dial-out only or one does not want to accept voice calls at that time.

*!DN=1 Disables Voice DN/MSN 1

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