LTPH-UM-1234-01
Appendix B - Specifications
HDU-409 Lists 1, 2, and 3
April 30, 2003
27
A
PPENDIX
B - S
PECIFICATIONS
Appendix A lists the specifications for the HDU-409.
HDSL
Line Code
784 kbps, 2B1Q full duplex
Output
+13 dBm
Line Impedance
135
Ω
Resistive Signature
Input/Output
5
Ω
(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, 135
Ω
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
µ
s (maximum either direction)
Mounting
Single 239 T1 Mechanics slot
Electrical Protection
Secondary surge and power cross protection on all
HDSL ports
