Appendix B - Functional Operation; H2Tu-C-202 List 3E Block Diagram - ADC HiGain H2TU-C-202 Manual

LTPH-TP-1005-02, Issue 2
A
PPENDIX
ADC's HDSL2 technology provides full-duplex services at standard T1 rates over copper wires between an
H2TU-C and an H2TU-R, which comprise one HiGain HDSL2 system. HiGain HDSL2 systems use 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.
A block diagram of the H2TU-C-202 is shown in
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 and synchronizes
with it. The H2TU-C recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing. When
the data is unframed, the H2TU-C arbitrarily defines a frame bit.
Factory Test
37
(Do Not Use)
Factory Test
20
(Do Not Use)
25
Fuse Alarm
35
17
Circuit
Ground
Tip
5
HDSL 2
SPAN
15
Ring
Chassis
Ground
1, 27
48 Management Bus
30
Alarm
22
H2TU-C-202 List 3E
B - F
UNCTIONAL
HDSL 2
XCVR
-185 Vdc
_
Power
+
Supply
(Ground isolated
+
and ground fault detect)
_
Figure 33. H2TU-C-202 List 3E Block Diagram
February 28, 2001
O
PERATION
Figure 33. The H2TU-C-202 receives a 1.544 Mbps DSX-1 data
Framer
Loopback
NLOC
CREM
Microprocessor

Appendix B - Functional Operation

DSX-1
T1
41
R1
47
BRG OUT
IN
BRG
T
7
DSX-1
R
13
57