Ampex Russia
- Internet Telephony Service Provider
- Phone To Phone
- Cisco Systems
- Dialogic Based
- Trabas
- Tario.net
Configurations
of GSM/VoIP networks allow the service providers to avoid the local Wired
Public Switched Network (PSTN) in communication with a GMS mobile handset. As a
result, the high rates charged by telephone companies are avoided.
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