Answer
Apr 07, 2025 - 05:53 AM
SIP registrations determine a Cisco phone's compatibility with different VoIP systems and its ability to handle multiple accounts. The best models support multiple SIP registrations for greater flexibility in managing different lines or services. Variations include the number of supported registrations. The Cisco 8841 and Cisco 8851 both support Open-SIP, offering broad compatibility. A range of options ensures you can find the right fit for your communication setup.
