Davicom DM336P, Operation Manual

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AT Command Set
Preliminary
25
Order No. DM336P-002-01
Version : DM336P-AT-P04
6 Use 19200bps DTE data rate.
7 Use 38400bps or above DTE data rate.
4,5= 0 Use even parity.
1 Use space parity.
2 Use odd parity.
3 Use mark or none parity.
6,7= 0 Turn off guard tone (&G0) – default.
1 Turn off guard tone (&G1).
2 Use 1800 HZ guard tone (&G2).
Register S25 : Data Terminal Ready Delay.
When Modem is on-line, it will ignore a Data Terminal Ready signal lasting less than the value of this register. In
this mode, the values for this register are 0 to 255 in hundredths of a second, and the default value is 0.05
seconds. If you will be entering synchronous mode after dialing asynchronously, this register determines how long
the modem waits before looking for the Data Terminal Ready signal. This lets you detach the asynchronous
terminal and connect a synchronous terminal while remaining in the Data Mode. In this mode, the values for this
register are from 0 to 255 seconds and the default value is 5.
Register S26 : Request To Send-to-Clear To Send Delay.
This register affects synchronous operation only and applies only when you are using the &R0 command. This
register determines how long the modem waits to turn on the Clear To Send signal after a Request To Send OFF-
to-ON transition in 10 ms increment. The default value is 1, although this register accepts values from 0 to 255.
Register S27 : Bit-mapped Register.
Bit-mapped register S27 lets you control modem transmission mode and line type.
Bit Function
0 0 : Dial up line (&L0) – default.
1 : 2W Leased line (&L1).
1-7 Undefined.
Register S30 : Value of the voice inactivity timer.
S30 = 0 Voice inactivity timer off (default).
S30 = 1 - 255 This is the period of time (in sec), which if expired causes the modem to hang up the telephone
line if it is offhook and no data has passed during the period.
When there is an inactivity time out
with #CLS=8, the modem always
forces #CLS=0 and #BDR=0.
Register S36 : V.42 negotiation fallback.
Register S36 defines the type of connection attempted by the modem and the action to take if the attempt fails:
Bit Value Function
2,1,0 = 0 Modem hangs up.
1 Same as 5.