• Content count

  • Joined

  • Last visited

Community Reputation

0 Neutral

About blaz

  • Rank
    Will I break 10 posts?
  1. Any VoIP call using G.711 codec will have quality equal or better than a PSTN call.
  2. You can't. The CLI on GSM is network provided, i.e. the network identifies your handset based on your IMSI (subscriber identification) and the GSM operator database looks up your account based on it and retrieves your CLI and provides it to the network. The GSM gateway is nothing else but a large collection of GSM phones, where the handset has been replaced with a VoIP interface. So faking the CLI on a GSM gateway is the same as faking the CLI on a GSM phone - you can't do it. The best you can do is to program the GSM gateway to always apply CLIR (i.e. hide the CLI / make it "private").
  3. ThoughtPhreaker, a 0180 number in Germany is a shared-cost number. The first number after 0180 determines what the cost of the call is (when called from Germany). For the caller the original tarrifs were: 0180-1 - approximately the cost of a local call 0180-2 - has a call setup charge in addition to normal charges 0180-3 - approximately the cost of a regional call 0180-4 - has a call setup charge in addition to normal charges 0180-5 - approximately the cost of a long-distance call Nowadays most 0180 numbers are actually more expensive to call than regular numbers, because the tariffs for normal calls have been reduced in recent years while tariffs for 0180 numbers have mostly stayed the same. Internationally it often costs the same as calling a german mobile number, but sometimes it is charged as a fixed call. It all depends on the originating and terminating carrier.
  4. Freeswitch is not a fork of Asterisk, it is a completely new project by one of the Asterisk contributors.
  5. People may not be aware of it, but the full international (ITU) SS7 specification is available online free of charge for quite some time now. The ITU ISUP specification differs from the ANSI specification in many ways (for example there is no OLI in ITU ISUP), but it might still be interesting to some of you. See Q.761 to Q.764 here: For example the format of messages and their parameters sent across an ITU ISUP link are documented in Q.763.