Part of the Cisco Small Business Pro Series, the SIP-based Cisco SPA 504G 4-Line IP Phone has been tested to ensure comprehensive interoperability with equipment from voice over IP (VoIP) infrastructure leaders.
Cisco IP Phone 8811 - VoIP phone - SIP, RTCP, RTP, SRTP, SDP - 5 lines - charcoal
Cisco Unified IP Phone 6901 Slimline - VoIP phone - SCCP - charcoal
Cisco IP Phone 7841 - VoIP phone - SIP, SRTP - 4 lines
Cisco Unified IP Phone 7965G - VoIP phone - SCCP, SIP - silver, dark gray - refurbished
Cisco IP Phone 7811 - VoIP phone - SIP, SRTP - charcoal
The Cisco Unified IP Phone 7975G demonstrates the latest advances in VoIP telephony, including wideband audio support, backlit color touchscreen display, & an integrated Gigabit Ethernet port.
Cisco Small Business Pro SPA8800 IP Telephony Gateway - VoIP phone adapter - 100Mb LAN
Cisco Unified IP Phone 6901 Standard - VoIP phone - SCCP - charcoal
Cisco IP Phone 8811 - VoIP phone - SIP, RTCP, RTP, SRTP, SDP - 5 lines
Cisco Unified SIP Phone 3905 - VoIP phone - SIP, RTCP - charcoal
The Cisco SPA525G IP phone is a five-line phone that operates in wired or wireless mode. It uses Voice over IP technology, and provides additional connectivity via Bluetooth headset, Power over Ethernet, or a wireless client.
Cisco IP Phone 8821 - Cordless extension handset - Bluetooth interface - IEEE 802.11a/b/g/n/ac (Wi-Fi) - SIP - 6 lines
Cisco Unified Wideband Handset - Handset - for IP Phone 7906, 7911, 7941, 7961, 7970, 7971; Unified IP Phone 7906, 7911, 7941
Cisco IP Phone 8845 - IP video phone - digital camera, Bluetooth interface - SIP, SDP - 5 lines - charcoal
Cisco Multi-Charger - Battery charger / charging stand + AC power adapter - 12 output connectors - for Unified Wireless IP Phone 8821, 8821-EX
SPA 502G IP Phone uses standard encryption protocols to provide secure remote provisioning and unobtrusive in-service software upgrades. Cisco secure remote provisioning tools include detailed performance measurement and troubleshooting features.
Cisco Unified Wireless IP Phone 8821 - Cordless extension handset - Bluetooth interface - IEEE 802.11a/b/g/n/ac (Wi-Fi) - SIP - 6 lines
Cisco IP Phone 8851 - VoIP phone - SIP, RTCP, RTP, SRTP, SDP - 5 lines - charcoal