Hasan Co Ltd Bangladesh
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Fax To Fax
- Termination
- Billing Software
- Call Relay VoIP Solutions
- Cisco Systems
- INPERTEL
- NTS Billing
- InfoLink
Some telephones, depending on the brand and model, have the intercom function, which allows to begin communication by sending the signal. When the signal comes, the telephone set rings a signal different from the standard ring tone call. After that the telephone temporarily switches off from the telephone line and works as an intercom.
Alturaphone
Alturaphone is an IP telephony service and technology provider. We offer personalized services for businesses, resellers and distributors. Alturaphone provides VoIP services such as VoIP wholesale with a prepaid platform, GSM to worldwide VoIP termination
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