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 4/5/03A-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
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