SIP hátalari frá Grandstream GSC3510 sem hægt er að nota fyrir kallkerfi frá öllum helstu símkerfum, hljóð í báðar áttir.

• Full-duplex speakerphone with HD acoustic chamber, advanced acoustic echo cancellation
• 3 directional mics with MMAD & microphone beamforming array
• Full-band and wide-band audio codec support including Opus & G.722
• Integrated dual-band 802.11 a/b/g/n WiFi and Bluetooth
• One 10/100Mbps network port with PoE/ PoE+
• 2-pin multi-purpose input to support peripherals including call buttons