C55/C55i AT COMMAND SET Description Preliminary - Falcom

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C55/C55I AT COMMAND SET VERSION 1.00 • Otherwise, terminate all held calls (if any). 1 Terminate all active calls (if any) and accept "the other call" as the active call: • If a call is waiting, the waiting call will be accepted. • Otherwise, if a held call is present, the held call becomes active. 1X Terminate a specific call X (X= 1-7). The call may be active, held or waiting. The remote party of the terminated call will receive a "NO CARRIER" indication. Parameter X is the call number of the targeted call in the list of current calls available with AT command AT+CLCC. 2 Place all active calls on hold (if any) and accept "the other call" as the active call: • If a call is waiting, the waiting call will be accepted. • Otherwise, if a held call is present, the held call becomes active. 2X Place all active calls except call X (X= 1-7) on hold. Parameter X is the call number of the targeted call in the list of current calls available with AT command AT+CLCC. 3 Add a held call to the active calls in order to set up a conference (multiparty) call. Notes • The AT+CHLD command offers a broad range of options according to the GSM specifications. However, if you attempt to invoke an option which is not provisioned by the network, or not subscribed to, invocation of this option will fail. The responses in these cases may vary with the network (for example "Operation not allowed", "Operation not supported" etc.). • This Supplementary Service is only applicable to Teleservice 11 (Speech telephony), that is, voice calls can be put on hold, while data or fax calls cannot. For example, with AT+CHLD=2 you can simultaneously place a voice call on hold and accept another waiting voice call. But it is possible to place a voice call on hold in order to accept a waiting data of fax call, and afterwards recover the voice call. In this case, the only difference over speech telephony is that the data or fax call needs to be manually accepted via ATA (see example below). • In conflict situations, e.g. when a waiting call comes while there are already held calls, the above procedures apply to the waiting call only. For example, =0 rejects the waiting call, but does not affect the held calls. • See also the AT+CCWA command for details on how to display waiting calls. Example ^ SYSSTART at+cpin="9999" OK +CREG: 2 +CREG: 1,"0145","0016" The mobile is now registered. This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 160
C55/C55I AT COMMAND SET VERSION 1.00 at+ccwa=1,1,1 You activate the indication of waiting calls during voice calls. OK atd"1234567"; You make a voice call. OK +CCWA: "+491791292364",145,32,,0 You receive a URC indicating a waiting data call. at+chld=2 You put the voice call on hold. RING You now receive the RING of the data call. OK RING RING ATA You accept the data call. CONNECT 9600/RLP hello OK "+++" With "+++" you go in command mode. at+clcc You interrogate the status of all established calls. +CLCC: 1,0,1,0,0, "03038639268",129 + CLCC: 2,1,0,1,0,"+491791292364",145 OK at+chld=1 The active data call is terminated and the held voice call becomes active. OK at+clcc +CLCC: 1,0,0,0,0, "03038639268",129 OK 8.9 AT+CLIP Calling line identification presentation Syntax Test Command AT+CLIP=? Read Command AT+CLIP? Write Command AT+CLIP= Response(s) +CLIP: (list of supported s) OK Response(s) + CLIP: , OK ERROR +CME ERROR: Response(s) OK ERROR +CME ERROR: Reference(s) PIN ASC0 GSM 07.07 ● ● This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission. Page 161
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C55/C55i AT COMMAND SET Description Preliminary - Falcom

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