Cisco SPA504G 4-line HD PoE IP Phone is a better alternate for SPA9XX series Linksys IP Phones. SPA504 comes with HD voice quality. SPA505 internet phone is quite compatible with Asterisk, Freeswitch and SIP services like google voice etc. SPA504G is perfect phone for office. SPA504G IP Phone is PoE model which works seamless with Cisco switches.
|Dimensions||8.42 x 8.35. x 1.73 in. (214 x 212 x 44 mm)|
|Display||128 x 64 monochrome LCD graphical display with backlight|
|DTMF||in-band and out-of-band (RFC 2833) (SIP INFO)|
|RJ45 Ports||Two 10/100BASE-T RJ-45 Ethernet ports|
|Operating humidity||5% to 95% noncondensing|
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