Aastra M720 - Backup in Case of Unavailability of the Sip Access Point or the Ipbx

Installation Manual for digital sets - IP sets - SIP sets AMT/PTD/TR/0001/3/7/EN
SIP PHONES 51i, 53i, 55i AND 57i 05/2008 Page 9-67
9.15 Backup in case of unavailability of the SIP access point or the
iPBX
Phones 5xi have several line keys. Each key may be configured for connection to a specific SIP
access point, using the configuration file @MAC.cfg.
On a multi-site network, it is possible to configure an SIP access point per site.
An SIP phone registered on 2 iPBXs via 2 SIP access points may be called on its 2
nd
line (via call
rerouting) in case of unavailability of the SIP access point or the iPBX of the first line.
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