Aastra Telecom 9480i Series - Manual (Page 256)

Global SIP Settings
4-74 41-001160-03, Rev 00, Releaes 2.4
IP Phone Administrator Guide
Line3 specifies per-line values for proxy IP address and proxy port, so the phone
uses those parameter values for SIP calls made on that line. However, because
those parameters are part of the SIP network block, the phone does not apply any
of the global SIP network block parameters. So even though the global parameters
configure a SIP registrar, Line3 on the phone ignores all global network block
parameters. Since line3 does not contain a per-line SIP registrar entry, the phone
does not use a registrar for that line.
Note: Global SIP parameters apply to all lines unless overridden by a
per-line configuration.
Per-line settings are configurable for lines 1 through 7.
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