Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE (E1) Modems (S000474A) 97
7.7 ATDI Mobile Originated Call to ISDN Number
Description: TA attempts to set up an outgoing call to ISDN number. The termination character “;” is
mandatory to set up voice calls or to send *# codes for Supplementary Services. It must
not be used for data calls.
Syntax: Exec Command: ATDI<n>[;]
Response: If no dial tone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
NO DIALTONE
All other error reasons:
+CME ERROR: <err>
If successfully connected and non-voice call (TA switches to data state):
CONNECT <text>
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Parameter:
<n>
ISDN number String with maximum length of 20 characters. Allowed characters: +, 0-9, A, B, C.
Notes:
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
• This command is PIN protected;
• This command is not supported in airplane mode.
7.8 ATDL Redial Last Number Used
Description: This command redials the last voice and data call number used in the ATD command. If
terminated with semicolon, ATDL dials the last voice call number stored in the “LD”
phonebook. Otherwise, the last dialed data number will be used (not contained in the “LD”
phonebook).
Syntax: Exec Command: ATDL[;]
Response: If there is no last number or number is not valid:
+CME ERROR: <err>
If no dial tone (parameter ATX2 or ATX4):
NO DIALTONE
If busy (parameter setting ATX3 or ATX4):
BUSY
If connection cannot be set up:
NO CARRIER
NO DIALTONE
If successfully connected and non-voice call (TA switches to online data
mode):
CONNECT <text>
When TA returns to command mode after call release:
OK
If successfully connected and voice call:
OK
Notes:
• This command may be aborted generally by receiving a character during execution. Abortion is not possible
during some states of connection setup such as handshaking.
• Parameter “I” and “i” only if no *#-code is within the dial string.
• This command is PIN protected;
• This command is not supported in airplane mode.