ES 201 912 Protocol from OPENXTRA

ES 201 912

The usefulness of this protocol is that it allows SMS messages to be sent to mobile and landline telephone networks.

ES 201 912 is the European Telecommunications Standards Institute (ETSI) approved standard that allows the sending and receiving of Short Message Service (SMS) messages on PSTN/ISDN networks.

Protocol Type 1

Protocol Type 1 allows for a standard message size of 160 characters. Multiple messages may be combined. Protocol Type 1 is compliant with GSM SMS services and can be used with mobile devices.

This protocol, sometimes with minor variations, is used in the UK, Germany, France and other countries.

Protocol Type 2

Protocol Type 2 is a new design. It allows for messages up to 640 characters. Protocol Type 2 is designed primarily for the residential fixed networks.

Spain and Italy have implemented this solution.

Hardware requirements

Hardware for both protocol types is almost identical. The differences between the two protocols are found mainly in the higher protocol layers.

Data is transmitted in a traditional voice-band call, using 1200 Baud FSK modulation.

Any terminal hardware must be capable of sending and receiving 1200 Baud FSK according to ETSI standard for off hook data transmission.

About the Author

Denis Laverty Denis Laverty possesses more than 17 years experience in network management and communications, Denis has been involved with network management applications from the early DOS days; as product trainer, technical author and QA Director. In 2003 he co-founded OPENXTRA together with Jack Hughes and serves as its Managing Director.