Aastra Telecom SISIP 57I CT - Manual (Page 323)

Upgrading the Firmware
41-001160-00, Rev 01 Release 2.0 8-9
Firmware Upgrade
Firmware Upgrade Reference
For more information about setting automatic update on the IP phone, see the
"auto resync mode" and "auto resync time" parameters, see Appendix A, the
section,
“Configuration Server Settings” on page A-11 .