Specifications

UC864-E/G AT Commands Reference Guide

80304ST10041a Rev. 3 - 18/07/08

+CCWA - Call Waiting

0,1,7) and call waiting service disabling (AT+CCWA = 0,0,7) is that in the

first case the call waiting indication is sent to the device by network but this

last one does not report it to the DTE; instead in the second case the call

waiting indication is not generated by the network. Hence the device

results busy to the third party in the 2

case while in the 1

case a ringing

indication is sent to the third party.

Note: The command AT+CCWA=1,0 has no effect a non sense and must

not be issued..

AT+CCWA? Read command reports the current value of the parameter <n>.

AT+CCWA=? Test command reports the supported values for the parameter <n>.

Reference 3GPP TS 27.007

3.5.4.3.12 Call Holding Services - +CHLD

+CHLD - Call Holding Services

AT+CHLD=[<n>] Execution command controls the network call hold service. With this service

it is possible to disconnect temporarily a call and keep it suspended while it

is retained by the network, contemporary it is possible to connect another

party or make a multiparty connection.

Parameter:

<n>

0 - releases all held calls, or sets the UDUB (User Determined User

Busy) indication for a waiting call. (only from version D)

1 - releases all active calls (if any exist), and accepts the other (held or

waiting) call

1X - releases a specific active call X

2 - places all active calls (if any exist) on hold and accepts the other (held

or waiting) call.

2X - places all active calls on hold except call X with which

communication shall be supported (only from version D).

3 - adds an held call to the conversation

4 - Connects the two calls and disconnects the subscriber from both calls

(ECT).

Note: "X" is the numbering (starting with 1) of the call given by the sequence

of setting up or receiving the calls (active, held or waiting) as seen by the

served subscriber. Calls hold their number until they are released. New calls

take the lowest available number.

Note: where both a held and a waiting call exist, the above procedures

apply to the waiting call (i.e. not to the held call) in conflicting situation.

AT+CHLD=? Test command returns the list of supported <n>s.

+CHLD: (0,1,1X,2,2X,3,4)

Reference 3GPP TS 27.007