Inter-Tel AXXESS - Figure 2-5 Sample BRS Installation

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Specifications
INTER-TEL
®
AXXESS
®
MANUAL VERSION 11.0 – May 2008
Basic Rate S/T Interface (BRS) Card
SPECIFICATIONS
2
Basic Rate S/T Interface (BRS) Card
4.215 The Basic Rate S/T Interface card (BRS) allows the system to connect to North Ameri-
can or European ISDN basic rate trunks via S/T interface. The card supports eight ports. Each
port consists of two bearer channels (B-channels), each operating at a rate of 64,000 bits per
second, and one data channel (D-channel) operating at a rate of 16,000 bits per second.
4.216 BRS station ports can be connected to a data device (e.g., ISDN Modem or ISDN LAN
Bridge), a video device (e.g., video conference unit), or an ISDN phone via S/T interface. BRS
trunk ports may be connected to a Central Office [local exchange] ISDN BRI circuit via an S/T
interface and a Network Terminator Type 1 (NT1). In the U.S., the Central Office terminates
BRI circuit with a U interface. Therefore, an NT1 device is required to convert the U interface
to an S/T interface.
Figure 2-5. Sample BRS Installation