SPA504G Cisco 4-Line IP Phone

The SPA504G is a Cisco 4-line IP phone from the Small Business SPA 500 Series: a full-featured business-class SIP phone with a two-port Ethernet switch and 802.3af PoE for business or home office use. It connects directly to an Internet telephone service provider or to an IP PBX, and with the Cisco Unified Communications 500 Series it also runs SPCP and VoiceView Express.

The 128 x 64 pixel monochrome LCD is backlit, with dedicated illuminated buttons for mute, headset and speakerphone, a four-way rocking navigation knob and a voicemail waiting light. The headset jack is 2.5 mm and the handset uses an RJ-9 connector. Four independent SIP registrations are available in SIP mode, along with caller ID, three-way conferencing and a 100-entry personal directory. Voice codecs include G.711, G.726, G.729A and G.722.

Two 10/100BASE-T RJ-45 ports let a computer sit behind the phone on one cable. Power is 802.3af PoE, or the optional PA100 5 VDC adapter at 2.0 A maximum with 100-240 V AC input, ordered separately. The phone measures 8.42 x 8.35 x 1.73 in (214 x 212 x 44 mm), weighs 2.0 lb (0.9 kg), and ships with a handset, stand, handset cord, RJ-45 Ethernet cable and a CD.

Up to two Cisco SPA500S expansion modules add up to 64 buttons in SIP mode. Among SPA 500 phones the SPA504G has 4 voice lines, against 8 on the SPA508G and 12 on the SPA509G. The SPA122 analog telephone adapter is a related Small Business voice product, and more phones and voice gateways are in Cisco misc.

Related part: SPA508G Cisco 8-Line IP Phone