Voice over IP Solutions (VoIP) - SMC
Voice over IP Solutions (VoIP) - SMC
Voice over IP Solutions (VoIP) - SMC
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Signaling Protocols<br />
S<strong>IP</strong> Architecture<br />
V.70<br />
Terminal<br />
S<strong>IP</strong><br />
Terminal<br />
Location<br />
Server<br />
H.324<br />
Terminal<br />
S<strong>IP</strong><br />
Terminal<br />
Speech<br />
Terminal<br />
S<strong>IP</strong><br />
Terminal<br />
S<strong>IP</strong><br />
Gateway<br />
PSTN N-ISDN<br />
Speech<br />
Terminal<br />
S<strong>IP</strong><br />
Server<br />
H.320<br />
Terminal<br />
S<strong>IP</strong><br />
Terminal<br />
H.321<br />
Terminal<br />
LAN / Network<br />
B-ISDN /<br />
ATM<br />
H.310<br />
Terminal<br />
A-VO<strong>IP</strong>-16<br />
The S<strong>IP</strong> architecture contains several componente (or elements) that<br />
perfom specific functions in the network:<br />
S<strong>IP</strong> Endpoint Terminals are used for bidirectional multimedia<br />
communications and are either a PC or a dedicated device<br />
supporting S<strong>IP</strong> and one or more applications (like an <strong>IP</strong> phone for<br />
example). S<strong>IP</strong> terminals are compatible with H.324 terminals on<br />
POTS, H.320 terminals on ISDN, H.310 terminals on B-ISDN, H.322<br />
terminals on guaranteed QoS LANs and V.70 GSTN (Global<br />
Switched Telephone Network) terminals.<br />
A Location Server maintain the <strong>IP</strong> addresses of all users and is, for<br />
example responsible for translating alias names to <strong>IP</strong> addresses.<br />
The S<strong>IP</strong> Server is responsible for call handling and call<br />
establishment. Call control can be implemented in one of two ways -<br />
either in proxy mode or in redirect mode.<br />
Just like H.323 Gateways, S<strong>IP</strong> Gateways are used to interconnect<br />
various different telephony (and video conferencing) technologies.<br />
These gateways convert digitized voice into <strong>IP</strong> packets and translate<br />
call control information.<br />
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