Aastra Telecom 800 manual Internal SIP Subscribers, License Assignment

Voice over IP (VoIP) SIP Telephony

information is available for NAT on an incoming RTP connection. To avoid this problem, the IP address of a workstation computer or telephone visible on the Internet is determined using a STUN server (STUN: Simple Traversal of UDP over NAT). You can ask your SIP provider for the STUN server’s IP address and port number. If you don’t need a STUN server, leave the SIP Provider field empty.

■For direct SIP telephony using Aastra 800, only SIP IDs consisting of numbers for identifying subscribers registered with the SIP provider specified can be addressed

■You can integrate an external SIP connection in the Telephony: Trunks: Route menu into the route configuration. You can use a network provider rule to specify the routing of numbers within a specific range to use SIP telephony as a preference (see also PBX Networking, under Configuration starting on page 94).

You can configure SIP connections in the Configurator on the pages Telephony: Trunks: SIP trunks and Telephony: Trunks: SIP provider. Enter the technical attributes of a specific SIP provider, such as the IP addresses for the registrar and the STUN server under SIP provider. Under SIP trunks enter the information for an existing SIP account, such as the user name, password, assigned call number and the maximum number of simultaneous calls possible.

7.3.2 Internal SIP Subscribers

The Aastra 800 becomes available as the SIP server for internal SIP subscriber telephony switching services. SIP telephones connected via LAN or SIP programs installed on workstation computers can thus establish connections to all other subscribers or trunks connected to the Aastra 800.

License Assignment

The number of possible SIP subscribers is determined by the number of licenses purchased. In order to provide you with the greatest possible flexibility regarding usage of available licenses, license assignment is dynamic via the “Floating license”. Using a user/password combination (“SIP log on”) you can have several SIP subscribers under the same call number. Only every new SIP log-on occupies a new license. The technical log-on process of a SIP subscriber with a valid user name and correct password is always successful. Only when a connection is estab- lished is there an attempt made to occupy a license under the SIP log-on. If all licenses are occupied currently, the SIP subscriber can only make emergency calls.

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