A2Z Trading A.G. Switzerland
- International VoIP Wholesale Provider
- H.323 VoIP Gateway
- Clarent
- Custom Open Source Billing Solution
“Extension” - is the extension of the telephone line (PBX) or the Centrex system. It works as an association and allows calling to certain telephone sets without the necessity of dialing the telephone number, but only by dialing a short combination of digits, reaching the desired subscriber.
isdcall.com
ISD Call is one of the leading VoIP (Voice over Internet Protocol) Service Provider specialising in Internet Telephony Solutions for various businesses, Our vision is to emerge as a major VoIP Service Provider by integrating telephony system with the cont
Read moreTop countries:
United States 1294 India 440
United Kingdom 425
Canada 348
Bangladesh 338
China 142
Pakistan 134
Australia 133
Spain 123
Russia 114View all countries