TGSip app for iPhone and iPad

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Social Networking
Developer: TGS Enterprise Network Ltd.

Free

Current version: 1.0.0, last update: 7 years ago
First release : 19 Jun 2013
App size: 12.91 Mb

TGSip is an internet phone (VoIP), compatible with the SIP protocol.

TGSIP can be used with a TGS Enterprise Ltd member only.

If you subscribe a VoIP to PSTN (=classic telephony) account to a telecom provider, you can reach everyone that has a "classic" phone line.
Alernatively.

List of supported features:
-audio with the following codecs: GSM,G711 (ulaw,alaw)

-multiple calls
-audio conferencing
-Address book integration
-Call history
-DTMF (telephone tones) support using SIP INFO or RFC2833