GSM defines a number of teleservices for use over the bearer services. These teleservices are
generally end-to-end user applications and are therefore transparent to their transporting
bearer services.
• Each teleservice is uniquely defined by a TS number (TS xx)
• Teleservices currently defined for GSM include:
• Speech (TS 11-12)
• Short Message Service - SMS (TS 21-23)
• Message Handling Systems - MHSs (TS 31)
• Videotext (TS 41-43)
• Teletext (TS 51)
• Fax (TS 61-62)
• Standard telephone services (TS 11)
• Transmission of speech information and fixed network signalling tones
• Transmission can be mobile originated as well as mobile terminated
• Emergency Service (TS12)
• Provides standard access to the emergency services irrespective of the country
in which the call is made
• Mandatory in GSM networks
• May be initiated from a mobile without a SIM
• Emergency calls can override any locked state the phone may be in
• Uses a standard access to the emergency call (112) as well as the national
emergency call code
• If the national emergency code is used the SIM must be present
The teleservices introduced as part of Phase 1 GSM included:
· Full rate speech
· Emergency (speech) calls
· SMS P-P and SMS Cell Broadcast (SMSCB)
· Telefax
· Voice/Fax mail
Phase 2 GSM provided the following additional teleservices:
· Half-rate speech
· Improvements to SMS
· Group 3 fax capability
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generally end-to-end user applications and are therefore transparent to their transporting
bearer services.
GSM Teleservices
• Teleservices are end-to-end subscriber services• Each teleservice is uniquely defined by a TS number (TS xx)
• Teleservices currently defined for GSM include:
• Speech (TS 11-12)
• Short Message Service - SMS (TS 21-23)
• Message Handling Systems - MHSs (TS 31)
• Videotext (TS 41-43)
• Teletext (TS 51)
• Fax (TS 61-62)
Speech Teleservices
Two categories of Speech Teleservices:• Standard telephone services (TS 11)
• Transmission of speech information and fixed network signalling tones
• Transmission can be mobile originated as well as mobile terminated
• Emergency Service (TS12)
• Provides standard access to the emergency services irrespective of the country
in which the call is made
• Mandatory in GSM networks
• May be initiated from a mobile without a SIM
• Emergency calls can override any locked state the phone may be in
• Uses a standard access to the emergency call (112) as well as the national
emergency call code
• If the national emergency code is used the SIM must be present
The teleservices introduced as part of Phase 1 GSM included:
· Full rate speech
· Emergency (speech) calls
· SMS P-P and SMS Cell Broadcast (SMSCB)
· Telefax
· Voice/Fax mail
Phase 2 GSM provided the following additional teleservices:
· Half-rate speech
· Improvements to SMS
· Group 3 fax capability
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