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Appendix D - AT Command Summary
RF300E/RF310E 139
analog calls for the given amount of time (n) for that analog port. Analog calls that are
received by that port while calls are being held off will not be rejected nor will a ring
be given. Rather the analog call will be held in an alerting state until *!Hn times out
at which point the call will begin the normal ringing process. Analog calls originated
from that port while the *!Hn timer is running will abort the timer and the call will go
out immediately. This command can be very useful for certain RAS environments
that require at least 1 second to initialize a port after a call has disconnected (such
as Citrix and Novell). See the troubleshooting section below for more information
about the use of this feature.
D.2 S-Registers
S-registers are sections of memory in which values are stored that affect how the TA operates. S-
registers are so-called because each has a name that begins with the character S. Use the Sr=n
command to assign a value to an S-register or use the Sr? command to read the current value of an
S-register. S-registers are stored in non-volatile RAM (NVRAM) by using the &W0 command.
ATZ<CR> restores S-registers to values stored in NVRAM if any were stored using the &W0
command, otherwise they revert to factory default settings in ROM. Table D-2 summarizes the
available S-registers and their function.
Table D-2. S-Register Summary
S-Register Function
S0 Rings Until Answer
S1 Ring Count
S2 Escape Character
S3 Carriage Return Character
S4 Line Feed Character
S5 Backspace Character
S7 Wait for Connection (Abort Timer)
S8 Pause Time for Comma
S10 DCD Drop Time
S25 DTR Drop Time
S29 On-line Inactivity Timer Period
S30 On-line Inactivity Timer
S32 Escape Sequence Timeout
S34 Maximum Escape Sequence Length
S50 Caller Line ID (CLI)
S52 Auto-Protocol Detection
S53 Maximum X.75 Buffer Size
S54 B-Channel Origination Rate
S55 Information Transfer Capability for Analog Port Calls
S56 Calling Party Number Information Element Settings
S57 Called Party Number Information Element Settings
S79 Reset Modem after Disconnect
S80 Persistent DTR Dialing Delay
S81 Link Setup Timeout
S82 Delay Before Trying V.110
S83 Modems Handle V.110
S84 Data to Terminal Delay
S85 Data to B-channel Delay
S87 INS64 Analog Call Origination Delay
S89 Modem Ring/Dialtone Information
S154 B-Channel Answer Rate