ArtDio IPS 1000 Manual Do Utilizador

                                                                       

      IPS 1000 Series VoIP Gateway

 

 

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SIP clients include the following: 

Phones—Can act as either a UAS or UAC. Soft phones (PCs that have phone capabilities installed) and 

Cisco SIP IP phones can initiate SIP requests and respond to requests.   

Gateways—Provide call control. Gateways provide much functionality. The most common one is a 

translation function between SIP conferencing endpoints and other terminal types. This function includes 

translation between transmission formats and between communications procedures. In addition, the 

gateway also translates between audio and video Codec and performs call setup and clearing on both 

the LAN side and the switched-circuit network side.   

SIP servers include the following: 

Proxy server—The proxy server is an intermediate device that receives SIP requests from a client and 

then forwards the requests on the client's behalf. Basically, proxy servers receive SIP messages and 

forward them to the next SIP server in the network. Proxy servers can provide functions such as 

authentication, authorization, network access control, routing, reliable request retransmission, and 

security.  

Redirect server—Provides the client with information about the next hop or hops that a message should 

take, then the client contacts the next hop server or UAS directly.   

R

egistrar server—Processes requests from UACs for registration of their current location. Registrar 

servers are often co-located with a redirect or proxy server.