You can use the connected switches within an enterprise to communicate easily, regardless of the location or the communication server that the switches use. Interswitch connections also provide shared communications resources, such as messaging and call center services.
Switches communicate with each other over trunk connections. Different types of trunks provide different sets of services. Commonly used trunk types are:
Central Office (CO) trunks that provide connections to the public telephone network through a central office.
H.323 trunks that send voice and fax data over the Internet to other systems with H.323 trunk capability.
H.323 trunks that support DCS+ and QSIG signaling.
Tie trunks that connect switches in a private network.
SIP trunk equipped with SIP signaling
For more information about the trunk types, see Administering Avaya Aura®Communication Manager, 03-300509.
