sipXecs enables better voice quality because media streams are always routed peer-to-peer along the shortest path and not through the PBX controller as is the case with most other systems. This allows full support for higher bandwidth codecs such as Polycom's HD Voice (using G.722 wide-band codec) without imposing any restrictions on how many calls can be active at any given time. Polycom HD Voice delivers over twice the clarity of ordinary phone calls for life-like, vibrant conversations. The difference is so astounding, you will never want to go back to regular phone calls. sipXecs release 3.6 and up supports HD Voice.

Models that support HD Voice

• SoundPoint IP 335
• SoundPoint IP 450
• SoundPoint IP 550/560
• SoundPoint IP 650
• SoundPoint IP 670
• SoundStation IP 6000
• SoundStation IP 7000
• VVX 1500
• VVX 300/310
• VVX 400/410
• VVX 500
• VVX 600