Aastra Telecom SIP 57I - Manual (Page 21)

IP Phone Models
41-001160-00, Release 2.1, Rev 04 1-3
Overview
Overview Optional Accessories
The following are optional accessories for the IP Phones.
A Power over Ethernet (PoE) inline power injector supplies 48V power to the IP
phone through the Ethernet cable on pins 4 & 5 and 7 & 8.
Reference
For more information about installing the PoE and additional Ethernet cable, see
your phone-specific Installation Guide.
Warning: Do not use this inline PoE power injector to power other
devices. See your phone-specific Installation Guide for more information.
Power over Ethernet (PoE) Additional Ethernet Cable
(category 5/5e straight through
Inline Power Injector
cable)