Quectel UG Series User Manual

UMTS/HSPA Module Series
WCDMA UGxx AT Commands Manual
WCDMA_UGxx_AT_Commands_Manual Confidential / Released 138 / 247
Parameter
<uid> Message identification in the user data header (UDH). Range from 0 to 255. This
parameter is defined and inputted by the user. All segments of a same
concatenated message must have the same <uid>. Different concatenated
messages should have different <uid>.
<msg_seg> Sequence number of a concatenated message. Range from 0 to 7.
<msg_seg>=0 means: ignore the value and regarded it as a non-concatenated
message.
<msg_total> The total number of the segments of one concatenated message. Range from 0
to 7. <msg_total>=0 or 1 means: ignore the value and regard it as a
non-concatenated message.
<da>,<toda>,<mr> Please refer to AT+CMGS
1. For concatenated messages, the maximum length will be reduced by the length of the user data
header (UDH). 3GPP TS 23.040 defines two kinds of UDH length: 6 bytes and 7 bytes, so the two
kinds of <uid> are 8 bit (6 bytes) and 16 bit (7 bytes). AT+QCMGS uses 8 bit <uid>.
 In the case of GSM 7 bit default alphabet data coding scheme, the maximum length of each
segment of a concatenated message is (140 octets - 6 )*8/7=153 characters.
 In the case of 16 bit UCS2 data coding scheme, the maximum length of each segment is
(140-6)/2=67 characters.
 In the case of 8-bit data coding scheme, the maximum length of each segment is 140-6=134.
2. <mr>, Message-Reference field gives an integer representation of a reference number of the
SMS-SUBMIT or SMS-COMMAND submitted to the SC by the MS, and it is used to confirm the
SMS-DELIVER received from SC duplicate or not. <uid>, the field of UDH, is message identification
of the concatenated SMS, which is different from <mr>. Each segment in a concatenated message
should have the same <uid>, but <mr> must be incremented for each segment of a concatenated
message.
3. AT+QCMGS does not support to send message in PDU mode (AT+CMGF=0).
Example
AT+CMGF=1 //Set SMS message format as text mode
OK
AT+CSCS="GSM" //Set character set as GSM which is used by the TE
OK
AT+QCMGS="15056913384",120,1,2 <CR> //Input 120 for <uid>, send the first segment of the
concatenated SMS
>ABCD<Ctrl-Z>
Maximum Response Time
120s, determined by network.
NOTES
Quectel
Confidential

Quectel UG Series Specifications

General

Brand	Quectel
Model	UG Series
Category	Control Unit
Language	English

Summary

Introduction to AT Commands

AT Command Syntax and Structure

Explains the basic, S parameter, and extended syntax of AT commands.

Safe Module Power Off Procedure

Describes the recommended procedure to safely turn off the module.

General AT Commands Reference

Requesting Device Identification

Commands to retrieve manufacturer, model, and IMEI information.

Parameter Configuration and Defaults

Commands for setting parameters to defaults and storing user profiles.

Phone Functionality and Error Reporting

Commands to set phone functionality and control error message formats.

Serial Interface Control Commands

Configuring UART Baud Rate

Command to query and set the UART baud rate.

Status Control Commands

Extended Error Report and Configuration

Commands for extended error reports and general module configuration.

SIM Card Related Commands

IMSI and SIM Card Security

Commands for requesting IMSI and managing SIM card PIN/PUK.

Generic and Restricted SIM Access

Commands for direct SIM control and restricted SIM database access.

Network Service Commands

Operator and Network Registration Status

Commands for operator selection and network registration status.

Signal Quality Reporting

Command to indicate received signal strength and channel bit error rate.

Call Related Commands

Basic Call Operations

Commands for answering, dialing, and hanging up calls.

Switching Between Data and Command Modes

Procedures for switching between data and AT command modes.

Phonebook Management Commands

Writing and Managing Phonebook Entries

Commands for writing, deleting, and reading phonebook entries.

Short Message Service (SMS) Commands

SMS Service and Message Formatting

Commands to select SMS service and set message format.

Sending and Managing SMS Messages

Commands for sending, deleting, listing, and reading SMS messages.

Packet Domain Commands

Packet Domain Attachment and PDP Context

Commands for attaching to PS service and defining PDP contexts.

PDP Context Activation and Data State

Commands to activate/deactivate PDP contexts and enter data state.

Supplementary Service Commands

Call Forwarding and Waiting Control

Commands for managing call forwarding and call waiting services.

Call Identification and Restriction

Commands for controlling calling and connected line identification.

Audio Command Reference

Volume and Audio Configuration

Commands for speaker volume, mute, and digital audio interface.

Audio Tuning and Noise Reduction

Commands for audio tuning, echo cancellation, and noise reduction.

Hardware Related Commands

Module Power Off and Clock Settings

Commands for powering off the module and managing clock sources.

Appendix and Error Summaries

Error Code Summaries

Lists CME and CMS ERROR codes and their meanings for troubleshooting.

Summary of Unsolicited Result Codes (URC)

Provides a summary of Unsolicited Result Codes (URCs) and their conditions.