SimCom SIM7600 Series User Manual

Smart Machine Smart Decision
SIM7500_SIM7600 Series_AT Command Manual_V1.07 2017-12-25
120
This command allows the control the following call related services:
1. A call can be temporarily disconnected from the ME but the connection is retained by the
network.
2. Multiparty conversation (conference calls).
3. The served subscriber who has two calls (one held and the other either active or alerting)
can connect the other parties and release the served subscriber's own connection.
Calls can be put on hold, recovered, released, added to conversation, and transferred. This is
based on the GSM/UMTS supplementary services.
SIM PIN References
YES 3GPP TS 27.007
Syntax
Test Command Responses
AT+CHLD=?
+CHLD: (list of supported <n>s)
OK
Write Command Responses
AT+CHLD=<n> OK
ERROR
+CME ERROR: <err>
Execution Command
Responses
AT+CHLD
Default to <n>=2.
OK
ERROR
+CME ERROR: <err>
Defined values
<n>
0 – Terminate all held calls; or set User Determined User Busy for a waiting call
1 – Terminate all active calls and accept the other call (waiting call or held call)
1X – Terminate a specific call X
2 – Place all active calls on hold and accept the other call (waiting call or held call) as
the active call
2X – Place all active calls except call X on hold
3 – Add the held call to the active calls
4 – Connect two calls and cut off the connection between users and them simultaneously
Examples
AT+CHLD=?
+CHLD: (0,1,1x,2,2x,3,4)
OK
SIMCOM CONFIDENTIAL FILE

SimCom SIM7600 Series Specifications

General

Operating Temperature	-40°C to +85°C
Storage Temperature	-45°C to +90°C
Module Type	LTE Cat-4 Module
Form Factor	LCC
Frequency Bands	LTE-TDD: B38/B39/B40/B41
GNSS	GPS/GLONASS/BeiDou
Interfaces	USB 2.0
Power Supply	3.4V - 4.2V
Certifications	CCC
Data Rate	LTE Cat 4: 150Mbps DL / 50Mbps UL, HSPA+: 42Mbps DL / 5.76Mbps UL

Summary

3 AT Commands According V.25TER

3.2 ATD Dial command

Used to list characters for dialing strings and controlling supplementary services.

3.3 ATD><mem><n> Originate call from specified memory

Originates a call using specified memory and index number, supporting voice and data calls.

3.21 AT&F Set all current parameters to manufacturer defaults

Resets all current parameters to the manufacturer defined profile, terminating calls.

3.33 AT+CIMI Request international mobile subscriber identity

4 AT Commands for Status Control

4.1 AT+CFUN Set phone functionality

Selects functionality level in ME, impacting power draw; supports minimum, full, and manufacturer-defined levels.

4.2 AT+CPIN Enter PIN

Sends password to ME for operation, handling SIM PIN, PUK, and other security.

5 AT Commands for Network

5.1 AT+CREG Network registration

Controls presentation of unsolicited result codes for network registration status and location.

5.2 AT+COPS Operator selection

Attempts to select and register a GSM/UMTS network operator, supporting automatic or manual selection.

5.3 AT+CLCK Facility lock

7 AT Commands for SMS

7.1 AT+CSMS Select message service

Selects messaging service, not supported in CDMA/EVDO mode.

7.3 AT+CMGF Select SMS message format

7.13 AT+CMGS Send message

Sends message from TE to network (SMS-SUBMIT).

8 AT Commands for Phonebook

8.1 AT+CPBS Select phonebook memory storage

Selects active phonebook storage for subsequent phonebook commands.

8.3 AT+CPBF Find phonebook entries

9 AT Commands for GPRS

9.1 AT+CGREG GPRS network registration status

Controls presentation of unsolicited result codes for GPRS network registration status.

9.3 AT+CGACT PDP context activate or deactivate

9.4 AT+CGDCONT Define PDP context

Specifies PDP context parameter values for a PDP context identified by <cid>.

14 AT Commands for File Transmission

14.1 AT+CFTRANRX Transfer a file to EFS

14.2 AT+CFTRANTX Transfer a file from EFS to host

15 AT Commands for Internet Service

15.1 PDP

Manages Packet Data Protocol contexts for network connectivity.

15.2 TCP/UDP

Handles TCP and UDP socket operations for network communication.

15.3 FTP

15.4 FTPS

15.5 HTTP

Handles Hypertext Transfer Protocol operations like GET and POST.

15.6 HTTPS

Manages Hypertext Transfer Protocol Secure operations.

15.8 NTP

17 AT Commands for GPS

17.1 AT+CGPS Start/Stop GPS session

Starts or stops GPS session, supports standalone, UE-based, and UE-assisted modes.

17.2 AT+CGPSINFO Get GPS fixed position information

Gets current position information, including latitude, longitude, altitude, date, time.

17.11 AT+CGPSFTM Start GPS test mode

17.13 AT+CGPSXE Enable/Disable GPS XTRA function

17.16 AT+CGPSINFOCFG Report GPS NMEA-0183 sentence

17.21 AT+CGPSMODE Configure GPS and GLONASS mode