User`s guide

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DL3100 Technical
SpeciÞcations
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This appendix covers various technical speciÞcations.
T3 Network Port Interface
Table A-1 lists the network port interfaces for the DL3100.
External Clock Specifications
Table A-2 lists information for the external clock.
Table A-1 T3 Network Port Interface
Item Description
T3 Line Rate 44.736 Mbps ± 20 ppm
Line Code B3ZS
Framing Format Standard (M13) or C-bit Parity
Signal Level To 900 ft of WECO 728 cable
Pulse Shape Meets Bellcore TR-TSY-000009
Transmit LBO 0 ft to 225 ft, 226 ft to 450 ft
Impedance 75 W unbalanced, resistive
System Timing Network, internal, or external
Specs Supported AT&T Accunet T45
Bellcore ANSI T1.404-1994
ANSI T1.404-1989
ANSI T1.107a (FEAC)
Table A-2 External Clock Specifications
Item Description
Input impedance 75 W
Input voltage +5 V Square Wave TTL
Clock Signal