Based on this product's specifications, here are some alternatives and similar models
IP Phone Cisco Unified IP Conference Phone 8831
Summary description:
The Cisco Unified IP Conference Phone 8831 features a 3.5" LCD display with a resolution of 396 x 162 pixels. It supports various voice codecs including G.711 and G.722, ensuring high-quality audio. The phone operates on SIP protocols and includes security features like 128-bit AES encryption. With a digital volume control and a microphone frequency range of 160 - 20000 Hz, it is designed for effective conference calls. Its sleek black design and durable plastic casing make it a reliable choice for any office environment.