Learning
USSD : Unstructured Supplementary Service Data (USSD)
UCB : USSD Call Back
The IN Switch USSD Callback is an innovative roaming solution that allows mobile subscribers to enjoy callback service by sending USSD string when they are abroad.
The solution grants the home network full control over the call and can perform all the pre-call checks and also rate the call in real time.
The operation of the service starts with a mobile subscriber who has roamed to an overseas country. The subscriber simply dials the number prefixes it with a short code.
for example:
#121*35774051244#,
where 35774051244 is the number to be called and 121 is the “USSD service”. The visited network routes the USSD string to the USSD platform in the home network thru the HLR.
The service checks the subscriber balance and establishes the call connection. The credit balance, maximum duration of the call and warning messages (i.e. called busy) can be sent to the subscriber thru USSD message. When the call is finished the balance of the prepaid account is updated.
LRN : Local Roaming Number
Mobile roamers often turn their handsets off, reject incoming calls or purchase local prepaid SIM cards to reduce their roaming expenses. Local Roaming Number service provides roamers with all the benefits of a local number, eliminating the need for them to acquire a foreign SIM card. This feature enables the roamer to present a ‘local presence’ while roaming.
HPMNs can pre-assign their outbound roamers with a local MSISDN (Mobile Station Integrated Services Digital Network) before their trip. The new local numbers can be used for receiving calls immediately. Calls can be generated using both the original number and the new local number, thus benefiting from reduced tariffs for mobile generated calls.
Home short code
This solution allows travelers to continue using their familiar short codes for home based VAS (Value Added Services) while roaming (for example voicemail, customer care, directory assistance, ect). Using Home Short Code operators provide visiting roamers seamless access to VAS. Features enable seamless VAS access and MNP support for outbound as well as inbound roamers.
ICA : Intelligent Call Assistance
Call assistance service corrects common dialing errors that roamers make due to unfamiliarity with international dialing. Roamers make frequent dialing errors when placing international calls, due to unfamiliar dialing conventions and language barriers. Statistics from live networks show that up to 60% of these calls are never completed with the result being lost operator revenue and fewer completed calls. Features of this service include seamless call completion, and/or intelligent SMS to educate users.
Reference :
* http://www.inswitch.us
* http://www.mobileeurope.co.uk
