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Chapter 7 – Call-Related Commands Notes: • Teleservices other than voice, data, fax are not fully supported by ME. They are used only in connection with the handling for AT+CSNS, and may therefore occur in parameter for mobile terminated calls. • If a URC “^SLCC” in verbose mode (see AT^SCFG) has been buffered while the interface was in dedicated mode (depending on the settings of AT+CMER parameter ), each buffered event indicator will be output as a separate URC after the interface returns to idle mode. • However, the output will deliver the list of current calls in the “current” state (at the time when the output is generated), possibly leading to multiple displays of identical list configurations. • Some parameters of AT command AT+CHLD, as well as some situations where the call status in the network changes very quickly (e.g., the transition between = “unknown”, “dialing” and “alerting” for a call to a reachable subscriber within the registered network) may lead to quasi-simultaneous changes to the states of one or several calls in the list, possibly leading to multiple displays of identical list configurations. • If multiple displays of identical list configurations occur, this happens because of intermediate states of the list, that have already been overridden by new transitions and states. Thus, it is guaranteed that the configuration displayed in such cases is the current configuration at the time of the last display. • It is adviseable to receive URC “^SLCC” on an interface that is not used for call initiation, if verbose output is configured. If only voice calls are expected, a setting of AT^SM20= 0 may be used alternatively in order to keep the call from blocking the interface. Examples Example 1 ^SYSSTART at+cpin=9999 OK +CREG: 2 +CREG: 1,”0145”,”0016” at^sm20=0 OK atd”1234567”; OK ^SLCC: 1,0,2,0,0,0,”1234567”,129,”Called Party” ^SLCC: ^SLCC: 1,0,2,0,0,1,”1234567”,129,”Called Party” ^SLCC: ^SLCC: 1,0,3,0,0,1,”1234567”,129,”Called Party” ^SLCC: ^SLCC: 1,0,0,0,0,1,”1234567”,129,”Called Party” ^SLCC: atd23456; OK ^SLCC: 1,0,1,0,0,0,”1234567”,129,”Called Party” ^SLCC: 2,0,2,0,0,1,”23456”,129 ^SLCC: ^SLCC: ^SLCC: 2,0,2,0,0,1,”23456”,129 ^SLCC: ^SLCC: 1,0,1,0,0,0,”1234567”,129,”Called Party” ^SLCC: 2,0,3,0,0,1,”23456”,129 ^SLCC: ^SLCC: 1,0,0,0,0,1,”1234567”,129,”Called Party” ^SLCC: NO CARRIER ^SLCC: NO CARRIER We are now registered command “ATD” for an outgoing voice call will terminate immediately with response “OK” We start a voice call. “OK” response is issued immediately because of setting “^SM20=0” MO call starts, paging B-party End of current list Traffic channel established, network may now transmit network announcements, ME may now transmit DTMF tones. End of current list Call is now ringing at B-Party End of current list B-Party has accepted the call, connection established End of current list We start a second voice call. “OK” response issued immediately because another call is already active (ATD) The active call is automatically put on hold, triggering the display of the list The second call has already started before the indication for the held call could be displayed End of current list Identical list is displayed again, triggered by the start of the second voice call Status of the second list entry has already been displayed with the previous URC End of current list The held call doesn’t change status right now The second call is now alerting the B-Party End of current list The held call doesn’t change status right now End of current list: the B-Party of the second call has not accepted the call in time, the second call has ended. The second call has ended list is now empty: B-Party has ended the first call The first call has ended Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 88
Chapter 7 – Call-Related Commands Example 2 ^SLCC: 1,1,4,0,0,1,”1234567”,129 ^SLCC: RING ^SLCC: 1,1,4,0,0,1,”1234567”,129 ^SLCC: RING ata OK ^SLCC: 1,1,0,0,0,1,”1234567”,129 ^SLCC: ath OK ^SLCC: Incoming call is signaled. Display is triggered by the incoming call, but the current status of the call at the time of display already comprises an active traffic channel. End of current list Incoming call is signaled. The incoming call had a traffic channel assigned from the start. This second identical display is triggered by the traffic channel assignment. Since the traffic channel was already indicated in the previous URC, both instances of the URC contain identical information. End of current list Incoming call is signaled. Incoming call is accepted. Call is established. The call is now active. End of current list Hang up the call. Hang up complete. The list of current calls is empty again 7.23 AT+CR Service Reporting Control Description: Test Command Syntax: AT+CR= Response: Read Command Syntax: AT+CR Response: AT+CR configures the TA whether or not to transmit an intermediate result code +CR: to TE when a call is being set up. Setting the value of to 1 may lead to connection failure, if the application (e.g., WinFax) waits for default result code/URC. +CR: (list of supporteds) OK ERROR +CR: OK ERROR Write Command Syntax: AT+CR= Response: OK ERROR Parameter Descriptions: 0 Disable. Default 1 Enable “REL ASYNC“ Asynchronous non-transparent “GPRS“ GPRS Intermediate Result Code: If enabled, an intermediate result code is transmitted during connect negotiation when the TA has determined the speed and quality of service to be used, before any error control or data compression reports are transmitted, and before any final result code (e.g., CONNECT) appears. +CR: Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 89
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Wireless EDGE Modems MultiModem ®
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Table of Contents Table of Contents
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Table of Contents 8.8.1 AT^MONI Res
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Table of Contents 16.5 AT+CPBW Writ
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Chapter 1 - Introduction Chapter 1.
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1.5 Supported Character Sets Chapte
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Chapter 1 - Introduction Figure 1.2
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Chapter 1 - Introduction 1.5.2.2 Im
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Chapter 1 - Introduction For most o
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Chapter 2 - Configuration Commands
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2.5 ATV Set Result Code Format Mode
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Page 51 and 52: Chapter 4 - Serial Interface Contro
Page 61 and 62: 5.2 AT+CPIN2 PIN2 Authentication Ch
Page 65 and 66: 5.4 AT+CLCK Facility Lock Chapter 4
Page 71 and 72: Chapter 6 - Identification Commands
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Page 93 and 94: Chapter 8 - Network Service Command
Page 107 and 108: Chapter 9 - Supplementary Service C
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Page 123 and 124: Write Command Syntax: Response: AT^
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Chapter 10 - Internet Service Comma
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Chapter 10 - Internet Service Comma
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Chapter 11 - GPRS Commands Chapter
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11.3 AT+CGATT GPRS Attach or Detach
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Chapter 11 - GPRS Commands 11.5 AT+
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Chapter 11 - GPRS Commands 11.7 AT+
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Chapter 11 - GPRS Commands This pa
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Chapter 11 - GPRS Commands This pa
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11.10 AT+CGQMIN Quality of Service
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Chapter 11 - GPRS Commands 11.11 AT
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Chapter 11 - GPRS Commands AT+CGDAT
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Chapter 12 - FAX Commands 12.3 AT+F
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Chapter 13 - Short Message Service
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Chapter 14 - SIM-Related Commands C
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Chapter 14 - SIM-Related Commands 1
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Chapter 14 - SIM-Related Commands 1
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Chapter 15 - SIM Application Toolki
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Chapter 17 - Audio Commands Chapter
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Chapter 17 - Audio Commands Please
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Chapter 17 - Audio Commands 16.5 AT
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Chapter 17 - Audio Commands 16.10 A
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Chapter 17 - Audio Commands Chapter
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Chapter 18 - Hardware-Related Comma
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Chapter 19 - Miscellaneous Commands
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Chapter 20 - Summary Tables 20.2 St
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Chapter 20 - Summary Tables 20.3 AT
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Chapter 20 - Summary Tables Interne
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Chapter 20 - Summary Tables 20.4 Av
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Chapter 20 - Summary Tables Interne
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Chapter 20 - Summary Tables 20.5 AT
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Chapter 20 - Summary Tables SIM-Rel
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Chapter 20 - Summary Tables ^SSTN ^
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Chapter 20 - Summary Tables Command
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Chapter 20 - Summary Tables Command
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