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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