Appendix B - Functional Operation; Timing; H2Tu-R-402 List 4E Block Diagram - ADC Campus-RS Remote User Manual

Appendix B - Functional Operation

A
PPENDIX
ADC HDSL2 technology provides full-duplex services at standard DS1 rates over copper wires between an
H2TU-C and an H2TU-R, which comprise one HiGain HDSL2 system. HiGain HDSL2 systems use ADC
Overlapped PAM Transmission with Interlocking Spectra (OPTIS) transceiver systems to establish full-duplex,
1.552 kbps data channels between the remotely located H2TU-R-402 List 4E and an H2TU-C.
A block diagram of the H2TU-R-402 List 4E is shown in
The H2TU-R-402 List 4E power supply converts the 90 to 200 Vdc power that is received on the simplex pairs to
voltage and currents required by the remote unit circuitry.
Factory use only
20
Ring
13
HDSL2 Span
7
Tip
48V IN
35
17
+
Circuit
Ground
1
27
T
IMING
The low-loop wander (0.3 UI max) of an H2TU-R-402, when used with a compatible line unit, allows the circuit
to be used in all critical timing applications, including those that are used to transport Stratum 1 timing.
34
B - F
UNCTIONAL
HDSL 2
XCVR
HDSL2
Framer
Power
Loopback
Supply
Chassis Ground
Microprocessor
Figure 25. H2TU-R-402 List 4E Block Diagram
O
PERATION
Figure 25.
Protection
CLOC
NREM
Protection
June 16, 2000
152-402-145-02, Issue 2
Tip 1
5
DS1 OUT
(RCV)
15
Ring 1
BRG
OUT (RCV)
IN (XMT)
BRG
Tip
55
DS1 IN
(XMT)
49
Ring
H2TU-R-402