IOP and IOA Module Specifications
3-port Channelized Inverse Multiplexing over ATM (IMA) Module
Beta Draft Confidential
CBX 500 Multiservice WAN Switch Hardware Installation Guide
4/5/03
A-47
DS1 Standards
•
AT&T Publication 62411
•
Bellcore TR-TSY-000312
•
Bellcore TR-NWT-000499
•
ANSI T1.403
•
ANSI T1.107
•
ANSI T1.231
•
RFC 1406
Physical Interfaces
Three DS3 ports, conforming to relevant ANSI, Bellcore, and International
Telecommunication Union (ITU) specifications
Physical Connectors
Two 75-ohm BNC connectors for each port (transmit/receive)
Line Coding
B8ZS line coding
Signal Levels
•
Receive: Peak pulse amplitude from 0.2 to 0.85 volts
•
Transmit: Conformance to ANSI T1.102 pulse template and amplitude
(0.36 volts to 0.85 volts) for cable lengths up to 450 feet
Clocking Options
•
Loop timing
•
Internal timing (better than Stratum 4 - +/- 20 PPM [part per million])
•
External timing via 1.544 MHz T1 source