Dear customer: About the SMS modem, we have four itmes, different item different function and of course different price, we have wavecom modem with Q2303, Q2403, Q2406, Q24Plus.
Q2303 support SMS. 900/1800MHz
Q2403 support SMS and MMS. 900/1800MHz
Q2406 support SMS, MMS and TCP protocol. 900/1800MHz
Q24plus suport SMS, MMS and EDGE. 850/900/1800/1900MHz

GSM Bulk SMS Modem Description:
The device built-in 32 wireless modules can be inserted 32 SIM cards, can use 32 cards to send text messages. MMS. Send speed as 32 times as a single channel modem. It uses the development of WAVECOM module, 220V power supply, can be a long time stability, generous luxury housing. It is working compatible with windows 2008 R2, Windows 7, Vista, XP, 2006/2000, 98SE/CE,LInux


Key Feature:

Just like 32 single-channel equipments work at the same time
Can insert 32 SIM cards(big or small)
Connection with the computer through a data line can be integrated with Serial 32
Each channel with separate power switch
Each individual module can be demolished
Industrial chassis, elegant shell
GSM frequency: 850/900/1800/1900MHz
32 x SIM card(big/small) slots
Wireless access to internet
Comply with GSM phase2 standard
Dual-band/Quad-band(optional)
USB interface(optional)
32 SIM Card supported (Big/Small)
Optional data, voice function
Can send and receive English SMS MMS in bulk

Basic Feature:

Asynchronous, transparent or non-transparent, to a maximum 14400 bits / s
Baud Rate: 300-115200 bits / s
Automatic baud rate: From 2400 to 19200 bits / s
Fax support three
Switched voice and fax
V. 42, V. 42bis
GPRS compatible
WAP compatible
SMA Antenna Interface
SIM Card Outlet
Power connector
RS-232, the Mini-dB-9 connector
AT command control ( GSM 07.07 and 07.05)

Application:

Large shopping malls, supermarkets
Professional market, large wholesalers
Large hotels, large-scale entertainment
Large agencies
Transport, logistics industry
Large enterprises, and institutions
Large hospitals, large bookstore
Newspaper, television and radio stations
Oil Company ( other chain business model)
Government agencies or large township

Hardware Feature:

Support dual-band GSM: 900/ 1800 MHz
Meet the ETSI GSM 2 + standards
Class 4 ( 2W @ 900 MHz) Class 5 ( 1W @ 1800 MHz)
5 -24 VDC power supply (which can be directly connected to the nickel- metal
Hydride or lithium batteries)
Operating Temperature: -20 ?? C - + 55 ?? C
Storage temperature: -25 ?? C - + 70 ?? C
Size: Standard 1U chassis 



Any inquiry, pls contact me freely!