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LTPH-UM-1234-01 Appendix B - Specifications
HDU-409 Lists 1, 2, and 3 April 30, 2003 27
APPENDIX B - SPECIFICATIONS
Appendix A lists the specifications for the HDU-409.
HDSL
Line Code 784 kbps, 2B1Q full duplex
Output +13 dBm
Line Impedance 135Ω
Resistive Signature
Input/Output
5Ω (typical)
Start-up Time
(per span)
15 seconds (typical), 30 seconds (maximum)
Line Clock Rate
Internal Stratum 4 clock
Power Dissipation
3.0W (nominal)
Maximum
Provisioning Loss
35 dB @ 196 kHz, 135Ω
Wander and Jitter
Nominal - The absence of an HDSL framer from the
HDU-409 reduces the Doubler Unit effect on a
circuit’s overall wander and jitter to second order
insignificance when compared to the wander and jitter
of other circuit modules.
Latency
80 µs (maximum either direction)
Mounting
Single 239 T1 Mechanics slot
Electrical Protection
Secondary surge and power cross protection on all
HDSL ports