Private circuit switched voice networking

Last Updated : Nov 21, 2014 |

Where leased line circuits are used within a private networking scenario, these E1 or T1 interfaces are typically configured to use Q.SIG signaling between sites.

Q.SIG provides a level of voice feature transparency between PBXs and is the favored signaling standard within multiple vendor and international voice networks. The IP Office E1 or T1 module terminates a QSIG connection with a 120 ohm RJ45 interface.

Figure : 1. Circuit switched voice networking
IP Office supports the following Q.SIG services across this network:
Simple Telephony Call/Basic Call
ETS300 171/172
Circuit Switched Data Call/Basic Call
ETS300 171/172
Called/Calling Line ID Presentation
ETS300 173
Called/Calling Name Presentation
(SS-CNIP, SS-CONP, SS-CNIR) ETS300 237/238
Message Waiting
(SS-MWI) EN301 260/255
Transfer
(SS-CT) ETS 300 260/261
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