Specifications:
Input Voltage: 100-240V AC 50/60Hz
Output Voltage: 48V DC
Output current: 520mA
Output Power: 25W Max
Power with Cable length: about 6.6FT / 200cm
It perfect replacement for 310mA / 375mA / 380mA / 500mA as amperage isnt forced. (If your previous Adaptor was less than 520mA then this will be a perfect replacement as amperage is NOT Forced)

Compatible with
--Polycom VVX 101, 201, 300, 301, 310, 311, 400, 401, 410, 411, 500, 501, 511, 550, 600, 601, 611, 1500
--SoundPoint IP 560, and SoundPoint IP 670
--Compatible with Cisco IP phones: 7902G, 7906G, 7911G, 7914, 7915, 7916, 7940, 7940G .
--Replacement for CP-PWR-CUBE-3
--Avaya 1100 & 1200 Series: 1110, 1120e, 1140e, 1210, 1220, 1230 and Polycom VVX 500, 501, 600, 601

Package:
1 x DC 48V 520mA Power Supply

Note:
--Do not work for Cisco Models Listed 7942
--Do not work for Cisco Models Listed 8811, 8841, 8851, 8861, 8961, 9951, 9971, CP-8861-3PCC-K9
--Do not work for for CP-PWR-CUBE-4
--Do not work for for 88XX / 89XX / 99XX Series