Dyad Group, s.r.o. Czech Republic
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Voip consulting
- Consultancy Services
- Installation and Support Services
- IP devices
- SIP VoIP Gateway
- System Integration
- Cisco Systems
- Vegastream
- IP Phone
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.
Switzernet Sarl
To use Switzernet, nothing is more simple: you just need a highspeed Internet connection, ADSL or cable, and one of our handsets. Plug it to Internet and that
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