Administration
A31003-D3000-M100-02-76A9, 11-2013
114 OpenScape Desk Phone IP V3R3, Phone Administration, Administrator Documentation
System Settings
3.5.10.1 Connectivity Check
A regular check ensures that the TLS link to the main SIP server is active. When
the Connectivity check timer is set to a non-zero value, test messages will be
sent at the defined interval. If the link is found to be dead, the phone uses DNS
SRV to find another SIP server. Certainly, the DNS SRV records must be properly
configured in the DNS server.
Value range: 0 (off), and 10 to 3600 sec.
If no other primary SIP server is found via DNS SRV, the phone will switch over
to a backup server for making receiving calls. For configuring the backup server,
please refer to Backup SIP Server.
Administration via WBM
System > SIP interface
Related Topics
Related Topics
•
Resilience and Survivability
3.5.10.2 Response Timer
The Response Timer resp. Call trans. timer is started whenever the phone
sends a new INVITE message to the SIP server.
If the call transaction timer expires before the phone gets a response from the SIP
server, the phone assumes that the server had died and then attempts to contact
the backup server, if configured. If there is no backup server configured, the
phone just tidies up internally.
The data is given in milliseconds. The default value is 32 000; for OpenScape
Voice, the recommended setting is 3.7 seconds (3700 ms).
