Chapter 2 Q-SIG FEATURES
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SYSTEM CONFIGURATION
PRT
The Primary Rate Interface Trunk (PRT) provides the Q-SIG Primary Rate Interface (1.5 Mbps PCM-
23B+D/2 Mbps PCM-30B+D) and a built-in D Channel Handler (DCH). The PRT has the following func-
tions.
For 24PRT:
• Unipolar/Bipolar Conversion (AMI/B8ZS Format)
• Alarm Detection/Insertion
• Loopback Test (Local Loopback)
• Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For 30PRT:
• Unipolar/Bipolar Conversion (HDB3 Format)
• Alarm Detection/Insertion
• Loopback Test (Local Loopback)
• Cyclic Redundancy Checking (based on ITU-T Rec. G704)
For connection of a 24PRT and transmission line, twisted-pair cable can be used.
For connection of a 30PRT and transmission line, either coaxial cable or twisted pair cable can be
used.