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SIM800 Series_AT Command Manual_V1.09

2015-08-03

If connection successful and voice call

Parameters

<n>

String of dialing digits and optionally V.25ter modifiers dialing

digits:

0-9, * , #, +, A, B, C

Following V.25ter modifiers are ignored:

,(comma), T, P, !, W, @

Emergency call:

<n>

Standardized emergency number 112 (no SIM needed)

<mgsm>

String of GSM modifiers:

Actives CLIR (Disables presentation of own number to

called party)

Deactivates CLIR (Enable presentation of own number

to called party)

Activates Closed User Group invocation for this call

only

Deactivates Closed User Group invocation for this call

only

<;>

Only required to set up voice call , return to Command state

Parameter Saving

Mode

NO_SAVE

Max

Response

Time

20s(voice call)

Timeout set with ATS7 (data call)

Reference

V.25ter

Note

Parameter "I" and "i" only if no *# code is within the dial string

<n> is default for last number that can be dialed by ATDL

*# codes sent with ATD are treated as voice calls. Therefore, the Command

must be terminated with a semicolon ";"

See ATX Command for setting result code and call monitoring parameters.

Responses returned after dialing with ATD

For voice call two different responses mode can be determined. TA returns

"OK" immediately either after dialing was completed or after the call is

established. The setting is controlled by AT+COLP. Factory default is

AT+COLP=0, this cause the TA returns "OK" immediately after dialing

was completed, otherwise TA will returns "OK", "BUSY", "NO DIAL

TONE", "NO CARRIER".

Using ATD during an active voice call:

When a user originates a second voice call while there is already an active

voice call, the first call will be automatically put on hold.

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