363-206-295
Circuit Pack Descriptions
7-72
Issue 1
December 1997
Detailed Description of Operation
7
Transmission Circuitry
7
Transmit Direction.
7
Figure 7-29 is a functional block diagram of the 23H/23H-U
OLIU. The 23H/23H-U OLIU receives an STS-1 rate clock and an associated
frame pulse from each of the working and standby TSI circuit packs. The 23H/
23H-U OLIU, under control of the SYSCTL, normally selects signals from the
working TSI. If a failure of the working clock is detected, the 23H/23H-U OLIU can
be switched to the standby TSI under SYSCTL control. An STS-12 rate clock is
generated from the STS-1 clock and used in creating the STS-12 signal. Under
control of the SYSCTL circuit pack, the 23H/23H-U OLIU selects one group of 12
STS-1 signals from either of the 12 active or 12 standby STS-1 inputs. The 23H/
23H-U OLIU performs pointer processing and frame alignment and adds transport
overhead to the selected STS-1 signals. The 23H/23H-U OLIU provides access to
the transport overhead which is sent to and received from the OHCTL.
Figure 7-29. 23H/23H-U OLIU Circuit Pack Block Diagram
To
Rx Fiber
To
From
OHCTL CP
TSI CPs
From
OHCTL CP
-48V Fuses
From Shelf
SYSCTL CP
To/From
(Service &
(Service &
TSI CPs
TGS CP
Tx Fiber
Receive
Timing
Clock & Frame
DEMUX
Pointer
SONET O/H
and
MUX
Protection)
Protection)
Control
Intrashelf
Recovery
Timing
Electrical
Optical/
Convert
To
Optical
Electrical/
OC-12
OC-12
+
-48V (B)
-48 (A)
SONET O/H
12 STS-1s
STS-12 Signal
Timing
Processor
Pointer
and
12 STS-1s
STS-12 Signal
Processor
Содержание DDM-2000 OC-12
Страница 1: ...363 206 295 Issue 1 December 1997 DDM 2000 OC 12 Multiplexer Release 7 0 User Service Manual Volume I ...
Страница 37: ...Tables xxxviii Issue 1 December 1997 A A SONET Overview A 1 SONET Payloads A 18 A 2 SONET Transport Rates A 19 ...
Страница 506: ...INS PROG 8 of 8 Page INS PROG COMMANDS RELATED rtrv eqpt rtrv ne OC 12 DDM 2000 1997 December 1 Issue 11 89 ...
Страница 528: ...RTRV ATTR ALM 2 of 2 Page RTRV ATTR ALM COMMANDS RELATED set attr alm OC 12 DDM 2000 1997 December 1 Issue 11 111 ...
Страница 565: ...RTRV OC3 3 of 3 Page RTRV OC3 COMMANDS RELATED rtrv sync 11 148 1997 December 1 Issue OC 12 DDM 2000 ...
Страница 664: ...SET FEAT 3 of 3 Page SET FEAT COMMANDS RELATED rtrv feat OC 12 DDM 2000 1997 December 1 Issue 11 247 ...
Страница 766: ... Ctl T TOGGLE 2 of 2 Page Ctl T TOGGLE COMMANDS RELATED logout rlgn OC 12 DDM 2000 1997 December 1 Issue 11 349 ...
Страница 847: ...Multiplexer OC 12 DDM 2000 7 Release TARP TOP Manual User Service II Volume 363 206 295 1 Issue 1997 December ...
Страница 867: ...363 206 295 TOP Maintenance and Operation BLANK LEFT INTENTIONALLY PAGE THIS 12 1997 December 1 Issue ...
Страница 1145: ...Order Circuit 363 206 295 NTP 029 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1146: ...Order Circuit 363 206 295 NTP 030 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1182: ...Turnup System 363 206 295 NTP 033 1 of 1 Page 1997 December 1 Issue Unused LISTED ORDER IN BELOW ITEMS DO TO GO DETAILS FOR ...
Страница 1243: ...Clearing Trouble 363 206 295 TAP 107 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1393: ...363 206 295 DLP 513 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1394: ...363 206 295 DLP 514 1 of 1 Page 1997 December 1 Issue Unused ...
Страница 1456: ...363 206 295 DLP 523 7 of 7 Page 1997 December 1 Issue OC 12 via Access Broadcast Video for Cross connections of Example 4 Figure ...
Страница 1465: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 2 Page Schematic Ring Virtual ATM Sample 1 Figure ...
Страница 1469: ...DLP 525 363 206 295 1997 December 1 Issue 6 of 6 Page Ring Virtual ATM OC 12 DDM 2000 for Cross connections of Example 4 Figure ...
Страница 1565: ...363 206 295 DLP 543 6 of 5 Page 1997 December 1 Issue Network Broadcast Video of Test Transmission 2 Figure ...
Страница 1566: ...DLP 543 363 206 295 1997 December 1 Issue 6 of 6 Page Network Ring Virtual ATM of Test Transmission 3 Figure ...