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APPENDIX A: ISDN AT COMMAND
Command
Description
ATA
Go off-hook (answer the incoming call immediately)
ATB?
Display V.110 user rate for out-going calls
ATBn n=0
V.110 user rate: 600 bps
n=1
V.110 user rate: 1200 bps
n=2
V.110 user rate: 2400 bps
n=3
V.110 user rate: 4800 bps
n=4
V.110 user rate: 9600 bps
n=5
V.110 user rate: 19200 bps
n=6
V.110 user rate: 38400 bps
n=7
V.110 user rate: 48000 bps
n=8
V.110 user rate: 57600 bps (for Japan only)
Note : The V.110 rate is depend on the DTE speed . When HyperTerminal
open , if DTE speed is 600 , 1200 , 2400 , 4800 ,9600
,19200 ,38400 ,48000, and 57600 . Key in "ATB?" will
display the matchV.110 rate, If DTE speed is not in one of
the V.110 legal rate , then the "ATB?" will be set to default
speed 38400 .
ATD<number>
Make ISDN data calls, e.g. ATD5551000
ATDM<number>
Make modem calls over ISDN line, e.g. ATDM5551000
ATDT<number>
Dial out the ISDN phone number, e.g. ATDT5551000
ATDV<number>
Make ISDN Phone voice calls, e.g. ATDV5551000
ATDSn
Dial out the pre-stored phone number (n=0, 1, 2,.). Refer
to AT&Zn=<number> command for phone number
storage
ATDL
Re-dial the last ISDN phone number
ATEn n=0
Echo in command mode is disabled
n=1
Echo in command mode is enabled
ATH
Hang up the ISDN data calls
ATH1
Disconnect ISDN Phone voice calls
ATH3
Disconnect ISDN data calls and ISDN Phone voice calls
ATI3
View driver version
ATO
Return to connection (on-line) mode
AT!C0=n
ISDN D-channel protocol and switches selection
n=00
AT&T 5ESS Custom
n=01
Northern Telecom DMS-100 Custom
n=02
ETSI Europe ISDN
n=05
U.S. National ISDN-1 (NI-1), factory default