| Brand SKU AT640 |
AT640 is a user friendly, multi-line IP phone with rich function and crystal voice quality. It supports both SIP and IAX2 with 4 double color LED indicator and 4 softkeys. With the 9 double color LED indicator , this IP phone supports BLF function. Because of the good compatibility with all kinds of standard SIP and IAX2 softswitch and IP PBX system, it is the best choice of VoIP service based on broadband for SMB market.
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