363-206-295
Circuit Pack Descriptions
Issue 1
December 1997
7-47
General Description of Operation
7
The BCP3 provides the 51.84 MHz clock and the 8-kHz frame pulse to all main-b
and function units service and protection circuit packs. In the receive direction, the
BCP3 receives twelve 51.84 Mb/s STS-1s from an active main-b circuit pack and
groups them into sets of three STS-1s. Each set of three STS-1s is connected to
both active and standby function unit circuit packs. In the transmit direction, the
BCP3 accepts twelve STS-1s from active function unit circuit packs and transfers
them to the main-b-1 and main-b-2 circuit packs. The BCP3 also interfaces to the
SYSCTL and receives timing signals from the TGS circuit packs.
Cross-connections can be made from main-to-main or main to any function unit.
Detailed Description of Operation
7
Transmission Circuitry
7
Figure 7-20 provides an overall block diagram of the BCP3 circuit pack.
Transmit Direction.
7
In the transmit direction, under control of the SYSCTL circuit
pack, the BCP3 selects 12 STS-1 signals from the function unit slots and sends
them to the main-b slots.
Receive Direction.
7
Under control of the SYSCTL circuit pack, the BCP3 selects
12 STS-1 signals from the main-b slots. The 12 STS-1 signals are transmitted to
the function unit slots.
Clock and Frame SYNC Distribution
7
Each BCP3 circuit pack receives a 51.84-MHz clock and an associated 8-kHz
frame pulse from each of the active and standby TGS circuit packs. Each BCP3
provides balanced clocks at 51.84 MHz and balanced frame sync at 8 kHz to the
main-b-1 and main-b-2 circuit packs, and the four active and four standby function
unit circuit packs. It also provides a pair of clock and frame sync to the other BCP3
circuit pack. The BCP3, under control of the SYSCTL circuit pack, normally
selects signals from the active TGS. If a failure of the clock or frame is detected,
the BCP3 can automatically switch to the standby TGS circuit pack. The SYSCTL
can inhibit autonomous clock selection.
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 ...