Technical data

60
AT +iL<n>
Maximum data frame length. <n> should be in the range of 0 ... 2048. 0 defaults to
the maximum frame length supported by the Dialogic
®
Diva
®
Media Board.
AT +iM<n> <n> Working mode
1 Normal operation mode. TTY does not try to preserve the protocol data
unit boundaries (streaming). This mode fully emulates the behavior of a
"classic" modem or terminal adapter connected via a serial interface.
2 Fax mode. TTY switches to this mode as soon as a Fax CLASS 1 or Fax
CLASS 2 command is detected.
3 Voice mode (bit-transparent access to B-channel data).
4 RNA mode. TTY operates in framing mode, investigates protocol data
units, and provides ASYNC/SYNC conversion if necessary.
5 BTX over ISDN mode.
6 Frame mode. The TTY preserves the frame boundaries of the ISDN data
frames. Note that the Linux TTY interface will stream the data again.
AT +iN<Format> Format Numbering plan for destination/origination address and
presentation/screening indicators for origination address.
Number
1[/Num
ber2[/N
umber3[
/Numbe
r4]]]
Specifies the numbering plan identifier for the destination address
(Number1), origination address (Number2), presentation indicator - bits
[7:6] in octet 3a of origination address (Number3) and screening
indicator - bits [2:1] in octet 3a of origination address (Number4).
Number1 and Number2 should be in the range 0...127. Number3 and
Number4 should be in the range 0...3.
AT +iP<n> <n> Specifies the protocol stack used to transfer bearer data.
1 L1 - HDLC, L2 - X.75SLP and V.42bis data compression autodetection in
case of incoming connection, L3 - transparent
2 L1 - V.110 synchronous mode, L2 and L3 - transparent
3 L1 - V.110 asynchronous mode, L2 and L3 - transparent
4 L1 - analog modem (synchronous mode), L2 - V.42+V.42bis autodetect,
L3 - transparent
5 L1 - analog modem with full negotiation, L2 - V.42+V.42bis autodetect, L3
- transparent
6 L1 - HDLC, L2 - V.120, L3 - TA