Specifications

AN93
Rev. 0.8 33
+DS44 =
A,B,C,D,E,F,G,
H,I
Controls V.44 data compression function*.
A
Direction
0 No compression (V.42bis P0 = 0)
1 Transmit only
2 Receive only
3 Both Directions (V.42bis P0 = 11)
B Compression_negotiation
0 Do not disconnect if Rec. V.42 is not negotiated
1 Disconnect is Rec. V.42 is not negotiated
C Capability
0 Stream method
1 Packet method
2 Multi-packet method
D Max_codewords_tx 256 to 65536
E Max_codewords_rx 256 to 65536
F Max_string_tx 32 to 255
G Max_string_rx 32 to 255
H Max_history_tx ≥ 512
I Max_history_rx ≥ 512
*Note: Si2493 only
+ES = A, B, C Enable synchronous access mode
A – specifies the mode of operation when initiating a modem connection
D = Disable synchronous assess mode
6 = Enable synchronous access mode when connection is completed and data state is
entered.
B – This parameter should not be used.
C – Specifies the mode of operation when answer a modem connection
D = Disable synchronous assess mode
8 = Enable synchronous access mode when connection is completed and data state is
entered.
Table 20. Basic AT Command Set (Continued)
Command Action