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MC55 AT Command Set
7. Call related Commands
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MC55_ATC_V01.05 Page 137 of 469 2/10/04
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7. Call related Commands
The AT Commands described in this chapter are related to Mobile Originated (MOC, i.e. outgoing) Calls and
Mobile Terminated (MTC, i.e. incoming) Calls.
7.1 Call Status Information
For Circuit switched calls, including voice, fax and data calls, call status information is available with URC
''"
+CIEV": call'' (configurable via AT commands AT+CIND and AT+CMER) or - in more detail - from the list of cur-
rent calls. This list can be displayed on request via at commands
AT+CLCC and AT^SLCC. It can also be issued
by the ME in the form of an unsolicited result code "
^SLCC" if configured with AT^SLCC and AT+CMER.
URC ''"
+CIEV": call'' and URC "^SLCC" can be configured using AT command AT^SCFG. An overview of the pos-
sible configurations and their consequences for the availability of call status information will be given here.
Generally speaking, the call status values recognized by the ME are as follows:
•active
• held
• dialing (MOC)
• alerting (MOC)
• incoming (MTC)
• waiting (MTC)
• terminating: The call is not active anymore, but inband information is still available.
• dropped: The call has been suspended by the network, but may be resumed later.
The values "terminating" and "dropped" are not standardized for AT command AT+CLCC, and therefore only
available for command
AT^SLCC. A call in any of these two states will not appear in the list of current calls as
displayed with
AT+CLCC.
A call that is not recognized by the ME is considered to be in "unknown" state.
Some networks may schedule a traffic channel for a call that is not yet in the "active" state. This is reflected in
parameter
<traffic channel assigned> of AT command AT^SLCC and the corresponding URC.
Depending on the value of
AT^SCFG setting <succ>, Indicator "+CIEV" will be issued (if configured with
AT+CIND and AT+CMER)
• when a state transition ends in state "active" or in state "unknown"
(if
AT^SCFG setting <succ>=''restricted'').
• when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a traffic channel is established
(if
AT^SCFG setting <succ>=''verbose'').
The indicator value for indicator ""
+CIEV":call" will be "1" if at least one call is in states "held" or "active", and "0"
otherwise.
Depending on the value of
AT^SCFG setting <sucs>, Indicator "^SLCC" will be issued (if configured with write
command
AT^SLCC and AT+CMER)
• when a state transition ends in state "active" or in state "unknown" (if
AT^SCFG setting <sucs>="restricted")
• when any state transition (including transitions beginning or ending in state "unknown") occurs in the list of
active calls, or when a voice channel is established (if
AT^SCFG setting <sucs>="verbose").
Due to compatibility considerations, the powerup default for
AT^SCFG setting <succ> is "restricted", offering
compatibility to the standard behaviour of indicator ''"
+CIEV": call'', while the default for setting <sucs> is "ver-
bose".
- Siemens Cellular Engine 1
- Version: 01.05 1
- DocId: MC55_ATC_V01.05 1
- Contents 3
- MC55 AT Command Set 10
- List of Tables 11
- List of Figures 12
- 1. Introduction 13
- 1.2 Related documents 14
- 1.3 Document conventions 15
- 1.3.1 Quick reference table 15
- 1.4 AT command syntax 17
- 1.4.1 Using parameters 17
- 1.5 Supported character sets 19
- 1.6 Flow Control 26
- 1.9 Errors and Messages 29
- 2. Configuration Commands 30
- 2.2.1 AT&V responses 31
- 3. Status Control Commands 63
- 3.2 AT+CIND Indicator control 66
- 4.1 AT\Q Flowcontrol 89
- 4.5 ATE Enable command echo 93
- 4.7.1 Autobauding 98
- 5. Security Commands 103
- 5.2 AT+CPIN2 Enter PIN2 107
- 5.4 AT+CLCK Facility lock 115
- 5.5 AT^SLCK Facility lock 121
- 5.6 AT+CPWD Change Password 122
- 5.7 AT^SPWD Change Password 126
- 6. Identification Commands 127
- 7. Call related Commands 137
- 7.2 ATA Answer a call 139
- 7.10 AT+CHUP Hang up call 152
- 7.16 ATP Select pulse dialing 159
- 7.19 ATT Select tone dialing 162
- 8. Network Service Commands 186
- 8.4 AT+CSQ Signal quality 193
- 8.5 AT^SMONC Cell Monitoring 195
- 8.6.1 AT^MONI responses 198
- 8.6.2 Service states 199
- 8.6.3 Notes 199
- 8.7.1 AT^MONP responses 202
- 8.8 AT^SMONG GPRS Monitor 203
- 8.10 AT^SHOM Display Homezone 207
- 9.5 AT+CCUG Closed User Group 220
- 9.7 AT+CCWA Call Waiting 226
- 10. GPRS Commands 243
- 11. FAX Commands 281
- 11.23 AT+FRM Receive Data 306
- 11.24 AT+FRS Receive Silence 307
- 11.26 AT+FTM Transmit Data 309
- 12.1 SMS parameters 312
- 12.7 AT+CMGS Send SMS message 323
- 13. SIM related Commands 356
- 14.2 ^SSTN SAT Notification 364
- 14.4 AT^SSTR SAT Response 368
- 15. Phonebook Commands 370
- 16. Audio Commands 392
- 16.5 AT+CMUT Mute control 397
- 16.6 AT+VTD Tone duration 398
- 17. Hardware related Commands 425
- 17.2 AT+CCLK Real Time Clock 429
- 18. Miscellaneous Commands 439
- 19. Appendix 443
- 19.2 List of *# Codes 444
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