Appendix B - Functional Operation; Timing; H2Tu-C-202 List 1F Block Diagram - ADC HiGain H2TU-C-202 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 Pulse Amplitude Modulation (PAM) Transmission with Interlocking Spectra (OPTIS) transceiver
systems to establish full-duplex, 1.552 kbps data channels between the H2TU-C-202 and a remotely located
H2TU-R.
Figure 31 shows a block diagram of the H2TU-C-202. The H2TU-C-202 receives a 1.544 Mbps DSX-1 data
stream from the DSX-1 digital cross-connect interface. The H2TU-C contains a DS1 frame synchronizer
controlled by an 8-bit microprocessor that determines the type of framing on the DS1 stream. The H2TU-C
synchronizes to the type of framing detected. The H2TU-C recognizes Superframe (
Extended Superframe (ESF).
T
IMING
The low loop wander (0.3 UI max) of an H2TU-C, when used with compatible regenerators and remote units,
allows the circuit to be used in all critical timing applications, including those used to transport Stratum 1 timing.
54
B - F
UNCTIONAL
Figure 31. H2TU-C-202 List 1F Block Diagram
March 14, 2000
O
PERATION
SF ), including D4, or
152-202-116-02, Issue 2
H2TU-C-202 List 1F