User's Manual

11 None.
bit 6,7 00 &G0.
01 &G1.
10 1800Hz. (&G2)
S24 Sleep Inactivity Timer
Set the length of time, in units of 10 seconds, that the modem will operate in normal mode with no detected
telephone line of DTE line activity before entering low-power sleep mode.
Range: 0 - 255 (seconds)
S25 Delay to DTR
S25 serves two purposes. When the modem is operating in synchronous mode 1, the value assigned to S25
specifies the length of time the modem waits after a connection has been made before examining DTR. This
allows the modem to ignore an ON-to-OFF transition of DTR, giving the user time to disconnect the modem
from the asynchronous terminal and attach it to a synchronous terminal, without forcing the modem back to
the asynchronous command mode. During this time, the value for S25 is read in whole seconds.
In all other modes, and after call establishment in synchronous modes 1 and 4, the value is read in 1/100
seconds. In any mode, a change in DTR (ON or OFF) that persists for a period shorter than the value held in
S25 is ignored by the modem while it is in data mode.
Range: 0 - 255 (1 second for synchronous mode 1;
0.01 second otherwise)
S26 RTS to CTS Delay Interval
Pertains to synchronous operation only. When CTS tracks RTS (&R0) and the modem detects an ON-to-
OFF transition on RTS, this register sets the time delay before the modem turns CTS to ON.
Range: 0 - 255 hundredths of a second
S28 Bit Mapped Option Status
bit 0, 1 Reserved.
bit 2 Reserved.
bit 3, 4 Pulse dialing (&Pn).
0 = 39%-61% make/break ratio at 10 pulse per second (&P0).
1 = 33%-67% make/break ratio at 10 pulse per second (&P1).
2 = 39%-61% make/break ratio at 20 pulse per second (&P2).
3 = 33%-67% make/break ratio at 20 pulse per second (&P3).
bit 5 Reserved.
bit 6-7 MNP Link Negotiation Speed (*Hn).
0 = Link negotiation at highest speed (*H0).
1 = Link negotiation at highest speed (*H1).
2 = Link negotiation at highest speed (*H2).
S29 Flash Dial Modifier Time
Range: 0 - 255 10ms intervals