User guide

116
Chapter 5 - AT Commands
32 National
48 Network specific
64 Subscriber
96 Abbreviated
Numbering Plan
0 Unknown
1 ISDN/telephony
3 Data
4 Telex
8 National standard
9 Private
Default: 128 (disabled)
Modifies the value of Octet 3 of the Called Party Number Information Element that is sent
within the SETUP message for a data call and within each INFORMATION message that is
sent when dialing from the POTS port. To set a specific number type and numbering plan,
select an option from the Type of Number section above and add its value to the value of an
option in the Numbering Plan section above. For example, a National/ISDN Called Party
Number IE would be S57=33, where 32 (National) + 1 (ISDN/telephony) = 33 (National/
ISDN). By default S57=128, which means no Called Party Number IE is sent.
S79 Reset Modem After Disconnect
Usage: S79=n; S79?
Unit: Decimal ASCII code
Range: n=0 (Do not reset the modem)
n=1 (Reset the modem)
Default: 1 (Reset the modem)
S79 allows control of whether the modems associated with the TA port given this command
will reset the modem upon disconnection of the B-channel. The modem is reset upon
disconnect simply to make sure the modem is functioning from a known state to reduce
problems. Also, the modem may not know when the remote peer disconnects if the B-channel
drops before proper disconnect signaling is recognized by the modem. Because of this, the
modem may not disconnect for almost one minute and so resetting the modem when the B-
channel disconnects reduces down-time for the modem. Refer to S-register S83 for a
description of which TA ports affect which modem ports. Resetting a modem takes it out of
service for about four seconds. Some operating systems and some applications have difficulty
with the modem being reset because of the change of the EIA serial signals and so disabling
the reset may be required. By default, the TA resets the modems upon B-channel
disconnection.
S80 Persistent DTR Dialing Delay
Usage: S80=n; S80?
Unit: 1 second
Range: n=0 (no delay)
n=1-255 (1-255 seconds)
Default: 0 (no delay)
Once DTR is detected as present (active high) and other conditions required for the TA to dial
are met, a delay of S80 seconds will occur before stored number 0 is dialed. Some conditions