“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.
nPlusOne Limited
nPlusOne is a wholly owned subsidiary of Edinburgh Network Technologies Ltd. With literally decades of experience in the design and operation of SS7 and IP network infrastructure, hardware and OSS, as well as developer skills building the
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