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ZyXel adaptor voice over Internet protocol analogue phone
Supports ordinary Session Initiation Protocol (RFC 3261), which is appropriate for internet protocol telephone service deployment and addresses the demands of users who are connecting to emerging SIP-based communication networks. Multiple ways of configuration admitting Web-based configuration, Telnet direction, and TFTP Auto-Provisioning. It eliminates the time and effort affiliated with complicated installation operations. Supported the flexible voice over Internet protocol technology platform, one or more Session Initiation Protocol telephone number perhaps configured. Each Session Initiation Protocol telephone number could be freely assigned to either telephone port individually, or to both ports simultaneously.

Service suppliers demand just to supply a lower limit of one Session Initiation Protocol number to every subscriber. Charging and service deployment are simplified by admitting subscribers to apply two telephones with the same Session Initiation Protocol number. Whenever one phone is occupied, users might apply a secondary telephone to base a call when applying the same Session Initiation Protocol number. In addition, users could as well receive incoming calls even when the Session Initiation Protocol number is in use. The advantages let in increased traffic and service income. It becomes an ordinary telephone into an internet protocol telephone device at a really low price. Not just does it bear voice over Internet protocol service at a low per-port price meanwhile the inherent two-port Ethernet switch as well admits users to connect their personal computer to the reserve Ethernet port without adding an additional Ethernet switch or hub. As well it admits users to maintain PSTN telephone service and voice over Internet protocol service simultaneously. When ATA power down happens or voice over Internet protocol service is not accessible, outgoing phone calls shall be relayed to PSTN automatically. While voice over Internet protocol service is active, users could base calls to a PSTN telephone through dialing pre-fix numbers. Emergency calls or important calls could be relayed to PSTN automatically.