Điện thoại IP Cisco SPA504

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Điện thoại IP Cisco SPA504
Connectivity Type: IP/VoIP
Protocol Support: SIP, SPCP
Line Appearances: 4
Switch Ports: 2x 10/100 Ethernet
PoE: 802.3af compliant
Addt’l Ports: 2.5mm headset jack
Display: backlit monochrome LCD
Resolution: 128×64 pixels
Speakerphone: yes
Local Conferencing: 3-way
Audio Codecs: G.711a/u-law, G.726, G.729A, G.722
Voice Quality: wideband
QoS: yes
Expandable: yes