Specifications

Chapter 7 – Call-Related Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 79
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 and fax calls.
Exec Command Syntax: ATDI<n>[;]
Response: If no dialtone (parameter ATX2 or ATX4): NO DIALTONE
If busy (parameter setting ATX3 or ATX4): BUSY
If connection cannot be set up: NO CARRIER
All other error reasons: +CME ERROR
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 Description:
<n>
ISDN number String with maximum length of 20 characters. Allowed characters: +, 0-9, A, B, C.
Note:
• 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.
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 or fax number will be used (not contained in the “LD” phonebook).
Exec Command: ATDL[;]
Response: If there is no last number or number is not valid: +CME ERROR
If no dialtone (parameter ATX2 or ATX4): NO DIALTONE
If busy (parameter setting ATX3 or ATX4): BUSY
If connection cannot be set up: NO CARRIER
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.
7.9 ATH Disconnect Existing Connection
Description: Disconnect existing call from command line by local TE and terminate call.
Exec Command Syntax: ATH[<n>]
Response: OK
Parameter Description:
<n>
0 disconnect from line and terminate call
Notes:
• OK is issued after circuit 109 (DCD) is turned off, if it was previously on.
• ATH terminates every circuit switched call (voice, data or fax), even if it is issued via another interface. This
behavior is in accordance with ITU-T V.250; (07/97, “Hook control”: “ATH is terminating any call in progress.”).
• ATH clears any active PDP context or terminates any existing PPP connection, but only if issued on the same
interface where GPRS is used and if there is no pending network request for PDP context activation. It does not
affect PDP contexts and PPP connections on other interfaces (see also Chapter “ATH Manual rejection of a
network request for PDP context activation”).