SIM800 datasheet(360/380 Pages) SIMCOM

360 / 380 page

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SIM800 Series_AT Command Manual_V1.09

360

2015-08-03

an incoming call (incoming call accepts

waiting status), place active call on hold

and switch to incoming call. Switch

between both calls, placing each in the

hold state whilst the other is active

before terminating each one. This feature

relies on knowing each call’s ID. This is

done using the List Current Calls

(AT+CLCC) Command. A call’s ID is

required to switch between held and

active

calls.

Held

calls

are

not

automatically resumed when all other

calls are terminated. They need to be

made active using the AT+CHLD=2x

Command. Note call waiting must have

been

previously

enabled

for

this

demonstration to work.

AT+CHLD=2

AT+CHLD=21

AT+CLCC

AT+CHLD=22

AT+CHLD=12

AT+CHLD=11

+CCWA: "1391818

6089",129,1,""

<incoming call activated,

original on hold>

<original

call

activated,

incoming call held>

+CLCC:1,0,0,0,0,"62

418148",129,""

+CLCC:2,1,1,0,0, "139

18186089",129, ""

<Note incoming call held

flag set>

<original call held, incoming

call active>

Send busy status to incoming waiting

caller.

Establish a voice call from EVB, receive

an incoming call (incoming call accepts

waiting status), send ‘busy’ status to

waiting mobile. Note call waiting must

have been previously enabled for this

demonstration to work.

ATD6241xxxx;

AT+CHLD=0

RING

+CCWA: "1391818

6089",129,1,""

<incoming call sent busy

msg, current call retained>

Drop all calls on hold.

Establish a voice call from EVB, receive

an incoming call (incoming call accepts

waiting status), switch to incoming call

and drop all waiting calls.

Note call waiting must have been

previously

enabled

for

this

demonstration to work.

ATD6241xxxx;

AT+CHLD=2

AT+CHLD=0

RING

+CCWA: "1391818

6089",129,1,""

<incoming call actived,

original on hold>

<incoming

call

actived,

current call

terminate>

SIM800 Datasheet(PDF) 360 Page - SIMCom

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