Admin Guide - VoIP software provider

4.8.6. Handling incoming calls from GSM networkDepending on the “incalls” (gateway configuration) settings, incoming calls from gsm network can be handled in several ways.1. When incalls is set to 0-all incoming calls to gsm simcards will be dropped immediately2. When incalls is set to 1-the engine will pickup the call, hold a little (random time, but maximum 1 minute), and than drop. Also used in call simulations.3. When incalls is set to 2-call will be forwarded to the number specified by the “forwardnum“ option in the GSM network.-the simcards must support the forwarding options, otherwise this operation will fail4. When incalls is set to 3-the call will be forwarded to the Mizu server specified by the “outserverip” setting in the gateway configuration.-on the server, the call will be forwarded to the “gsminccalled” number (SimPlatform configuration). If the “gsminccaller” option is filled with avalid phone number, than the callernumber will change accordingly. Otherwise the caller number will be the original caller. The ip caller addresscan be changed with the “gsminccallerip” option. (thus you can simulate the routing from a predefined user)5. When incalls is set to 4-the caller will be asked to enter the target number (handled with dtmf), and the call will be forwarded to that number-the prompt played to ask the target number can be set by the “playdtmfreqfile” setting. This will have to point to a PCM 8000kHz, 8 bit monowave audio file.-the prompt to be played if the forwarding has failed can be specified by the “playdtmffail” setting. When the forwarding is in progress, the“playdtmfforward” file will be played to the user.-the call will arrive to the server with the „222‟ techprefix, and you can setup a separate routing roule for this tecprefixA possibe callflow for calls arrived to a working simcard in” inccals 3” mode:original caller initiate callcall routed by gsm networkcall arrives to our simcardconverting from gsm to h323call routed to GKon routing: caller will be converted to “gsminccaller”, called will be converted to “gsminccalled”call needs to be forwarded to “sip2h323”sip2h323 module doing the protocoll conversion from h323 to sipcall arrives to SIP module