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Power: Output Power: 12VDC, 500mA DC
WAN: RJ45 port
LAN: RJ45 port
Extended interface for BLF module: 2
Headset jack : RJ9 port
Handset jack : RJ9 port
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LCD: 128×64 dot matrix
FLASH: 4M
RAM: 16×16M
LED indicator ： 1 Status Light , 9 BLF indicator, 1 voicemail indicator, 1
headset indicator, 1 mute indicator, 1 handfree indicator
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5520
5
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