Yealink CP860 [15/417] User agent server uas

Product Overview

preferential to use this method when not using an application layer firewall. Application

layer firewalls like to know what applications are flowing though which ports and it is

possible to use content types of other applications other than the one you are trying to

let through what has been denied.

User agent server (UAS)

UAS is a server that hosts the application responsible for receiving the SIP requests from

a UAC, and on reception it returns a response to the request back to the UAC. The UAS

may issue multiple responses to the UAC, not necessarily a single response.

Communication between UAC and UAS is client/server and peer-to–peer.

Typically, a SIP endpoint is capable of functioning as both a UAC and a UAS, but it

functions only as one or the other per transaction. Whether the endpoint functions as a

UAC or a UAS depends on the UA that initiates the request.

This section introduces the CP860 IP conference phone. CP860 IP conference phones are

endpoints in the overall network topology, which are designed to interoperate with

other compatible equipments including application servers, media servers,

internet-working gateways, voice bridges, and other endpoints. CP860 IP conference

phones are characterized by a large number of functions, which simplify business

communication with a high standard of security and can work seamlessly with a large

number of SIP PBXs.

CP860 IP conference phones provide a powerful and flexible IP communication solution

for Ethernet TCP/IP networks, delivering excellent voice quality. The high-resolution

graphic display provides content in multiple languages for system status, call log and

directory access. CP860 IP conference phones also support advanced functionalities,

including LDAP, Sever Redundancy and Network Conference.

CP860 IP conference phones comply with the SIP standard (RFC 3261), and they can

only be used within a network that supports this type of phone.

In order to operate as SIP endpoints in your network successfully, CP860 IP conference

phones must meet the following requirements:

 A working IP network is established.

 Routers are configured for VoIP.

 VoIP gateways are configured for SIP.

 The latest (or compatible) firmware of CP860 IP conference phones is available.

 A call server is active and configured to receive and send SIP messages.