23-04-2021

Send Sms Using Gsm Modem

I need to develop an application that will send bulk sms messages to customers and allow recipients to send sms messages to a number say 1705 that will come through the modem and be parsed into a MS SQL database. I have been advised to use GSM modem and read/write serial ports using C# code. Any suggestions out there? Sep 11, 2019 If you have further questions regarding how to send SMS using GSM Modem, feel free to ask in the comment section. How to Receive SMS Using GSM Modem. In the above discussion we learned how to send a text message using GSM modem and also discussed the basics the GSM modem.

Gsm Modem Cost
Send Sms Using Gsm Modem With C#

SMS is the most common type of notification today. UCME-OPC™ can send SMS to any cell phone or landline phone that supports SMS.

SMS can be sent by the following means:

Using a cellular modem

Both CDMA and GSM are supported. SMS can be configured for both outgoing and incoming SMS. Incoming SMS can be used for alarm acknowledgement, Tag value change or query, report generation and more…

Supported modems

Sierra Wireless Airlink® RV50 4G (Ethernet modem) Dual SIM support, GSM & CDMA
Sierra Wireless AirLink LS300 3G (Ethernet modem) , GSM & CDMA
Sierra Wireless AirLink FX100 (Serial/USB) – GSM 3G – USB + Serial
Sierra Wireless GL6110 (USB), GSM 2G
Sierra Wireless GL6100 (Serial) GSM 2G
Cinterion/Gemalto BGS5T, MC52iT / MC55iT, TC65T – GSM 2G
MultiTech MultiModem GSM (USB or serial) – GSM 2G

Bidirectional SMS

UCME-OPC™ allows two-way SMS between recipients (such as technicians, field engineers or managers) and the control system. Recipients receive alarm notifications yet can also change set-points, acknowledge alarms, execute programs and scripts, and a range of other actions – directly from their cell phone.

Escalation using SMS and a cellular modem

UCME-OPC™’s sophisticated escalation procedure is a customizable alarm delivery feature that sends alarms to alternative recipients. When a recipient acknowledges the alarm, further, unnecessary repeat alarm notifications are prevented – reducing nuisance alarms and reducing costs. Alarms can be configured so that they are sent with a time delay between each SMS. Once and alarm is acknowledged or ended, the escalation may be stopped. If no acknowledgment is received, UCME will continue with the escalation reaching higher recipient levels.

Fallback SMS channel

If UCME-OPC™ fails to send a text message (SMS) via one channel (for example: a faulty GSM cellular modem), it will automatically switch to a fallback channel (for example: a CDMA cellular modem). This functionality reduces the chances that a text message will not be sent and as a result, increases the system reliability.

Native SMS via cellular modems – eliminating Internet threats

Unlike other software packages that require continuous Internet connection to send email-to-cellular messages, UCME-OPC™ uses native text messaging via cellular modems, which means your control system is completely protected from Internet security threats.

Sending production reports to your cell phone via SMS

Using the UCME-OPC™ Alarm Snapshot functionality, you may receive production reports to your cell-phone via SMS.

Sending SMS messages over the Internet using SMS gateways

UCME-OPC™ allows sending SMS over the Internet using SMS gateways. All you need is to contact an SMS Gateway service provider that will provide you the access to its SMS gateway service.

UCME-OPC™ allows sending SMS using your local language.

GSM Modems

A GSM modem, 3G modem or SIM box is basically a GSM phone without keyboard, speaker, battery and display. The terms SIM box, GSM gateway or GSM router are mostly used for devices that route phone calls through the GSM network and the term GSM modem or 3G modem for devices specialized in wireless data transmission. However for GSM modem software they often are interchangeable.

A GSM modem provides the SMS software with a secure gateway to the GSM network, with only two limitations. The amount of SMS message that can be sent and/or received is limited to 12-30 messages per minute, depending on the GSM modem and network, and it is not possible to send SMS messages with alternative numeric or alphanumeric sender id's.

GSM modems with an Ethernet port

Pros

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Very reliable
No modem drivers necessary
Industrial design, usually very robust
External power supply
External antenna, suitable for server rooms
Designed for 24/7 operation

Cons

Dependent on the availability of the LAN network

Brands and models

ConiuGo LAN modems

GSM modems with a serial port

Gsm Modem Cost

Wavecom Fastrack Supreme GSM modem

Pros

Very reliable
No modem drivers necessary
Connector can be fixed securely to the serial port
Industrial design, usually very robust
External power supply
External antenna, suitable for server rooms
Designed for 24/7 operation

Cons

Serial ports are often not available on new computers

Brands and models

ConiuGo serial port modems
Cinterion MC55iT, MC52iT, TC65T
Siemens MC55iT, TC65T, TC45T, TC35i
Wavecom Fastrack Supreme/M1306B/M1206, MOD2
Sierra Wireless AirLink Fastrack Xtend
Multitech MTCBA-G-F4

Serial GSM modem over TCP/IP

A very reliable way to use a serial GSM modem on a server that has no serial port is with a TCP/IP to RS232 convertor. An extra advantage is that the actual GSM modems can be placed anywhere in the network, even on remote locations. Diafaan SMS Server can use GSM modems over a TCP/IP connection directly, without the need for any additional COM port drivers.
Review of the ATC-1000 TCP/IP to RS232 converter

USB to RS232 converter

Another, slightly less reliable, way to use a serial GSM modem on a server that has no serial port is with a USB to RS232 converter. The USB to RS232 converter installs a virtual serial port on the PC that is used by Diafaan SMS Server.

GSM modems with a USB port