Q2403 Modem At Command
Overview
Product sourcing insights & recommendations
The Q2403 is an industrial-grade dual-band (900/1800 MHz) GSM/GPRS modem based on the Wavecom Q2403A/B engine ScribdManualzzAmazon. It is primarily used for SMS servers, remote dial-up systems (CSD), and legacy industrial IoT applications ManualslibAll-Guidesbox.
Technical Overview & AT Commands
The modem is controlled via standard AT commands (GSM 07.07/07.05) Scribd.
- Core Commands:
- `AT`: Communication check (Response: `OK`).
- `AT+CSQ`: Check signal quality.
- `AT+CMGF=1`: Set SMS text mode for sending/receiving messages Scribd.
- `AT+CREG?`: Verify network registration status Manualslib.
- Interfaces: Features a rugged aluminum enclosure, DB-9 RS232 serial port, and an SMA antenna connector ManualslibAll-Guidesbox.
- Configuration: Supports autobauding (1.2 to 115.2 Kbps) and wide voltage input (6V–36V DC) ManualslibScribd.
Market Trends & Insights
- Legacy Status: As a 2G-only device, the Q2403 is considered a legacy product. Global market trends for 2026 indicate a sharp decline in 2G infrastructure as carriers reallocate spectrum to 5G and NB-IoT LinkedinAccio.
- Current Demand: Usage is now concentrated in maintenance of existing industrial systems and niche bulk SMS markets in regions where 2G remains active Made-In-ChinaAlibaba.
- Product Sourcing: New units are becoming scarce; sourcing now primarily involves original refurbished modules or industrial stock from specialized B2B suppliers in China AlibabaAlibaba.
Wavecom Q2403 Modem Gsm Gprs Module
Products · 2 lists

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Sources & References
28 sources cited · Verified industry data & reports
QUASAR GSM-Q2403 MODEM MANUAL | ManualsLib
www.manualslib.com
The unit features auto bauding so any baud rate from 1.2 to 115.2 Kbps can be used, 8bits, no parity bit, 1 stop bit) On the terminal screen, type “AT” to check the “OK” response from the modem DS GSM-Q2403-1 ©2011 www.quasaruk.co.uk . Page 5... Page 6 Standby (registered to the net) Talk mode, GPRS data Blinking Basic AT Command List Basic AT Command List Basic AT Command List Basic AT Command List The commands are listed in the document Q2403 AT.pdf DS GSM-Q2403-1 ©2011 www.quasaruk.co.uk . View and Download Quasar GSM-Q2403 manual online. GSM/GPRS Modem. GSM-Q2403 modem pdf manual download. The modem is supplied in a rugged extruded aluminium enclosure making it suitable for use in a wide · range of industrial and demanding environments. The unit connects directly to a PC or terminal device via · the DB-9 RS232 Cable interface. The integral SIM card holder accepts standard SIM cards . The only · other connections required are to dc power supply and Antenna . ... Page 1 Description Description The GSM-Q2403 Modem is ideal for a wide range of applications. Page 2 Humidity: max. 80% relative humidity Size 76mmx54mmx25mm (Casing Dimension) Weight 100g (Approx.) Whats in the Box? Whats in the Box? Whats in the Box? Whats in the Box? GSM Modem Unit Antenna RS232 Cable Power Supply DS GSM-Q2403-1 ©2011 www.quasaruk.co.uk .
Datasheet Archive: WAVECOM Q2403 AT COMMAND datasheets
www.datasheetarchive.com
Wavecom Q2403 Q2406B AT - Command PDF | PDF | Subscriber Identity ...
www.scribd.com
Wavecom-Q2403-Q2406B-AT_Command.pdf - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Ce document est la propriete exclusive de WAVECOM. Il ne peut etre communique ou divulgue a des tiers sans son autorisation prealable. Max read / write length is 256 bytes for +WBW & +WBR commands. If not found, the product automatically searches for another network. 3) The product enters into manual/automatic mode, and then tries to find an operator as specified by the application (as in manual mode). If this attempt fails it enters automatic mode. If this is successful, the operator specified by the application is selected. 6.2.1 Description : There are three possible ways of selecting an operator (PLMN): 1) The product is in manual mode. It then tries to find the operator specified by the application and if found, tries to register. 2) The product is in automatic mode. It then tries to find the home operator and if found, tries to register. The read command returns the current mode and the currently selected operator. In manual mode, this PLMN may not be the one set by the application (as it is in the search phase). These commands are not allowed during one communication.
Quasar GSM-Q2403 Manual: GSM/GPRS Modem | Manualzz
manualzz.com
DS GSM-Q2403-1 ©2011 www.quasaruk.co.uk . Page 4 ... Choose the Com port connected to the modem. The unit features auto bauding so any baud rate from 1.2 to 115.2 Kbps can be used, 8bits, no parity bit, 1 stop bit) On the terminal screen, type “AT” to check the “OK” response from the modem Hi! I've reviewed the Quasar GSM-Q2403 manual. I'm prepared to assist with questions about this GSM/GPRS modem, its features (data, SMS, fax), connection details, and troubleshooting. Quasar GSM-Q2403 is a dual-band GSM/GPRS modem designed for industrial and demanding environments. It supports data, SMS, and fax functionality, making it ideal for remote dial-up systems, SMS servers, and various other applications. The modem features a rugged aluminum enclosure, a compact form factor, and a Wavecom GSM engine ensuring high quality and reliable operation. The GSM-Q2403 Modem is ideal for a wide range of applications. The modem can be used to make circuit switched data calls (CSD), making the unit suitable for remote dial-up systems where a fixed phone line is not available. The SMS functionality enables the sending and receipt of text messages.
DSQGSM Q2403 1 | PDF | Electronics | Digital Technology
www.scribd.com
DSQGSM-Q2403-1 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. GSM / GPRS Modem Features Dual Band 900 / 1800 MHz for UK use Fax, SMS, Data and Internet Integral SIM Card holder. The modem implements the Wavecom 2403 GSM Engine. This ensures high quality and reliable operation along with compatibility with all standard GSM networks. Description The GSM-Q2403 Modem is ideal for a wide range of applications. The modem can be used to make circuit switched data calls (CSD), making the unit suitable for remote dial-up systems where a fixed phone line is not available. The SMS functionality enables the sending and receipt of text messages. Choose the Com port connected to the modem. The unit features auto bauding so any baud rate from 1.2 to 115.2 Kbps can be used, 8bits, no parity bit, 1 stop bit) On the terminal screen, type AT to check the OK response from the modem The modem implements the Wavecom 2403 GSM Engine. This ensures high quality and reliable operation along with compatibility with all standard GSM networks. The modem is supplied in a rugged extruded aluminium enclosure making it suitable for use in a wide range of industrial and demanding environments.
Quasar GSM-Q2403 Modem Manual PDF View/Download
all-guidesbox.com
Download Manual of Quasar GSM-Q2403 Modem for Free or View it Online on All-Guides.com. The GSM-Q2403 Modem is ideal for a wide range of applications. The modem can be used to make circuit · switched data calls (CSD), making the unit suitable for remote dial-up systems where a fixed phone line · is not available. The SMS functionality enables the sending and receipt of text messages. A common use · for this functionality is an SMS server for the automated sending and receipt of bulk text messages. The modem implements the Wavecom 2403 GSM Engine. AT&T Home Base User Manual Operation & user’s manual (33 pages) Edimax EW-7811UAC Quick Installation Manual Quick installation manual (46 pages) Ebyte Wireless Modem User Manual Operation & user’s manual (16 pages) The modem is supplied in a rugged extruded aluminium enclosure making it suitable for use in a wide · range of industrial and demanding environments. The unit connects directly to a PC or terminal device via · the DB-9 RS232 Cable interface. The integral SIM card holder accepts standard SIM cards . The only · other connections required are to dc power supply and Antenna . ... GTP GTPConnect Verizon NWL-25 Operation & Maintenance Manual Operation & maintenance manual (3 pages)
