MultiMobile MT128ZLX User Guide Appendix D: Using AT Commands
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Command Options Function & Description
ATA Go off-hook (answer the incoming call immediately)
ATD <number> Dial out the ISDN phone number
ATDT <number> Dial out the ISDN phone number
ATDSn Dial out the pre-stored phone number (n=0, 1, 2,…).
See AT&Zn=<ISDN_phone_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 link
ATH4 Restart ISDN layer 2 link. Issue this command when SP ID numbers are changed.
ATH5 View ISDN TA status
Responses:
Line Lost: ISDN phone line is not properly attached.
SPID Fail: Both SPID numbers are incorrect
1 SPID Ready: One of the SPIDs incorrect
2 SPID Ready: ISDN TA OK
ATO Return to connection (on-line) mode.
Command Options Function & Description
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
AT!C6=n Set Service Profile ID 0 (SPID 0), where ” n” is the SPID number up to 20
characters.
Example: ISDN phone number: 5551000
SPID 0: 0555100001
AT!C2=n Set Service Profile ID 1 (SPID 1), where ” n” is the SPID number up to 20
characters.
Example: ISDN phone number: 5553000
SPID 1: 0555300001
AT!N0=n Set ISDN Directory Number 0 (DN 0), where “n” is the ISDN phone number.
Example: DN 0: 5551000 =>
n=5551000
AT!N1=n Set ISDN Directory Number 1 (DN 1), where “n” is the ISDN phone number.
Example: DN 1: 5553000 =>
n=5553000