Installation Manual for digital sets - IP sets - SIP sets AMT/PTD/TR/0001/3/7/ENSIP PHONES 51i, 53i, 55i AND 57i 05/2008 Page 9-679.15 Backup in case of unavailability of the SIP access point or theiPBXPhones 5xi have several line keys. Each key may be configured for connection to a specific SIPaccess 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 callrerouting) in case of unavailability of the SIP access point or the iPBX of the first line.6HUYHUGDWD '+&31733UR[\6,3,3%;6,33UR[\6,3,3%;6,3&RQQH[LRQ/YHUV,3%;&RQQH[LRQ/YHUV,3%;9LWDOVXEVFULEHU677 Æ Æ μ7HOHSKRQ\¶9/$1 'DWD9/$13KRQH9/$16HUYHUGDWD '+&31733UR[\6,3,3%;6,36,3DFFHVVSRLQWL3%;6,3&RQQH[LRQ/YHUV,3%;&RQQH[LRQ/YHUV,3%; Æ Æ'DWDVHUYHU '+&31736,3DFFHVVSRLQWL3%;6,36,3/FRQQHFWLRQWRL3%;/FRQQHFWLRQWRL3%; Æ Æ
