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BRT
The Basic Rate Interface Trunk (BRT) provides one, two or four physical interface to the ISDN-Basic Rate
Interface service (192 Kbps PCM-2B + D).
The BRT has the following functions.
• Unipolar/Bipolar Conversion (AMI Format) (S/T Interface)
• Signaling Insertion/Extraction
• Frame Synchronization
• Digital PAD on Voice Signal Transmission
For connections of BRT and transmission line, twisted-pair cables can be used.
NOTE:
We recommend the point-to-point connection when connecting the system to the public network
using the BRT card (Set the second data of CM35 Y=79 to 0).
For the point-to-multipoint connection using the BRT card, when the system is established far
from the public network, the communication error occurs easily because the ISDN signal fades
away.
CHAPTER 1 GENERAL INFORMATION
– 17 –
SYSTEM OUTLINE
NWA-008852-001 Rev.5.0
98ch1001.fm
NOVEMBER/15/2006
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