CallSat Telecom LTD is licensed telecommunication provider in Cyprus covering wholesale, corporate and retail markets providing to our customers telephony, datacenter services, hosting, termination and connectivity.
Advanced Voice Order Processing System (AVOP) is a wholly owned subsidiary of Nettel Holdings, Inc. By joining AVOP Direct, carriers and service providers will be able to avoid the time and expense of negotiating and managing one-time agreements with othe
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