Compass International Co., Ltd China
- Hosted VoIP billing service provider
- International VoIP Wholesale Provider
- VoIP Billing Software Provider
- Termination
- Cisco Systems
- another
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.
Telecomtrade
"Telecomtrade" trade system is dynamic developed company which offer complex of telecommunication services both for private individual and corporate clients.Constantly increasing demand influence on extension of voip market and as a result new sides of bu
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