Based on this product's specifications, here are some alternatives and similar models
VoIP Phone Snom SP800 Voice Codecs CNG G.711 G.722 G.729
Summary description:
The Snom SP800 VoIP phone features multiple voice codecs including G.711, G.722, and G.729. It supports dual stack IPv4/IPv6 and various management protocols. Designed for reliable communication, it operates on AC, DC, or PoE power sources. Compact dimensions make it suitable for any workspace.