Voice over IP (VoIP)
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Aastra 673xi/675xi SIP Telephones
You can operate the SIP telephones of the Aastra 673xi and Aastra 675xi product fam-
ilies at the OpenCom 100 communications system. The firmware of the communica-
tions system already includes the matching firmware files (Firmware addons,
“*_fwaddons_*.cnt”) for the following SIP telephones:
Aastra 673xi and Aastra 675xi SIP telephones
Model Short description
Aastra 6730i Basic level version of the Aastra 673xi products, 5 volts input
via wall power supply, display with 3 lines, 8 programmable
keys, 2 line keys
Aastra 6731i Similar to Aastra 6730i, but with 802.3af (PoE) power supply,
two Ethernet ports for PC and LAN, separate 48 volts wall
power supply available
Aastra 6739i Premium version with graphic touchscreen display, 802.3af
(PoE) power supply, two Gigabit-Ethernet ports for PC and
LAN, 11 softkeys on 5 levels, 3 line keys, up to 3 key extensions
with function keys or 3 key extensions with softkeys
Aastra 6751i Basic level version of the Aastra 675xi products, display with
3 lines, 802.3af (PoE) power supply, two Ethernet ports for PC
and LAN
Note: As of release 10 only supported as standard SIP
telephone.
Aastra 6753i Similar to Aastra 6751i, but with headset connector,
6 programmable keys, 3 line keys, up to 3 key extensions with
function keys; separate wall power supply in the package
Aastra 6755i Model with illuminated comfort display, 802.3af (PoE) power
supply, two Ethernet ports for PC and LAN, 6 programmable
keys and 6 softkeys, 4 line keys, up to 3 key extensions with
function keys or 3 key extensions with softkeys; separate wall
power supply in the package
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