MyPBX U100/U200 Administrator Guide
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6.2 Trunks
6.2.1 Physical Trunk
Multiply physical trunks are supported in MyPBX U100&U200, like BRI, PSTN,
and GSM/UMTS, please make sure you have installed the modules inside, BRI
trunk requires B2 module, PSTN trunk requires the O2, while for GSM/UMTS
trunk, and please install the GSM/UMTS modules inside.
Figure 6-19
BRI Trunk
Basic Rate Interface (BRI, 2B+D, 2B1D) is an Integrated Services Digital
Network (ISDN) configuration intended primarily for use in subscriber lines
similar to those that have long been used for plain old telephone service. The
BRI configuration provides 2 bearer channels (B channels) at 64 k bit/s each and
1 data channel (D channel) at 16 k bit/s. The B channels are used for voice or
user data, and the D channel is used for any combination of data,
control/signalling, and X.25 packet networking
Figure 6-20
Click edit to configure the details of BRI trunks