GSM Services

GSM Services

GSM Services are divided into three categories:-

1. Teleservices.

2. Bearer services.

3. Supplementary services.

             1. Teleservices provide:-

• Speech transmission-telephony
• Emergency call.
• Short message service.
• Videotext access.
• Teletext transmission.
• Facsimile transmission.

2. Bearer services :-

                  • Data services 

                  • Speech and data swapping during a call.

                  •  Modem selection.

3. Supplementary services:-

       i.  Call Completion Services like -

                 • Call Waiting (CW).

                 • Call Holding (HOLD).

                 • Completion of Call to Busy Subscriber (CCBS).

       ii. Calling Offering services like -

                 • Call Forwarding Unconditional (CFU).

                 • Call Forwarding Mobile Busy (CFB).

                 • Call Forwarding No Reply (CFNRy).

                 •  Call Forwarding Mobile Not Reachable (CFNRc).

                 •  Mobile Access Hunting (MAH).

     iii. Number Identification services like -

                • Calling Number Identification Presentation (CNIP).

                • Calling Number Identification Restriction (CNIR).

                • Connected Number Identification Presentation (CNOP).

                • Connected Number Identification Restriction (CNOR).

    iv. Multiparty Services like -

                • Conference Calling (CONF)

    v. Call Restriction Services like-

               •  Barring All Originated Calls (BAOC).

               •  Barring Outgoing International Calls (BOIC).

               •  BOIC except Home Country (BOIC-exHC).

               • Barring All Incoming Calls (BAIC).

               •  Barring Incoming calls when Roaming (BIC-Roam).

   vi. Charging Services like -

               • Advice of Charge (AoC).

               • Free Phone Service (FPH).

               •  Reverse Charging (REVC).