Imass Telecom United Kingdom
- International VoIP Wholesale Provider
- Internet Telephony Service Provider
- Hosted VoIP billing service provider
- Voip Termination ISP
- VoIP Billing Software Provider
- Voip consulting
- SIP Billing
- Phone To Phone
- Phone To PC
- Fax To Fax
- Web Call
- Outsourced Billing
- PC to Phone
- Web To Phone
- Voice and Video Conferencing
- Termination
- Billing Software
- Call Relay VoIP Solutions
- H.323 VoIP Gateway
- E1 Bulk Wholeseller
- Partnering for Origination and Termination
- H.323 Softswitch & CPE
- SIP Softswitch & CPE
- SIP VoIP Gateway
- Cisco Systems
- Quintum
- Java Based own system
The service allows the user defining the criteria, by which the signal of a certain incoming calls will sound different from the standard signal of the telephone call.
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