Technical 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.

Format

Numbering plan for destination/origination address and

presentation/screening indicators for origination address.

AT +iN<Format>

Number1[/N

umber2[/Nu

mber3[/Nu

mber4]]]

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.

<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

7 L1 - Fax, L2 - transparent, L3 - T.30 with ECM, T.6, MR,

MMR, polling

8 L1, L2, and L3 - transparent

9 L1 - HDLC, L2, and L3 - transparent

10 L1 - HDLC, L2 - X.75SLP, L3 - BTX

11 external device 0

AT +iP<n>

12 L1 - HDLC, L2 - X.75SLP and data compression

autodetection in accordance with V.42bis, L3 - transparent