363-206-295
Circuit Pack Descriptions
7-6
Issue 1
December 1997
An optical switch on the BBG8/BBG8B SYSCTL circuit pack latch causes a
suspension of controller operations and an "F" to be displayed on the controller
panel display when the latch is pulled. Closing the latch causes a controller reset.
These controls and indicators are discussed in more detail under "User Panel" in
Section 6, "Operations Interfaces."
General Description of Operation
7
The SYSCTL circuit pack provides the majority of the control functions on the
shelf. These include circuit pack monitoring, performance monitoring (PM),
protection switching, and user interfaces.
The SYSCTL, which contains a microprocessor, controls links to all other circuit
packs in the system and links to user interfaces. The processor also provides link
access procedure (LAPD) and LAPD packet data processing to support SONET
section DCC.
Detailed Description of Operation
7
Control Circuitry
7
Processor .
7
Figure 7-3 provides an overall block diagram of the SYSCTL circuit
pack. This processor is the highest level processor in the system.
Memory
7
Program Flash-EPROM .
7
The main program is stored in the flash-EPROM, which
combines the nonvolatility of EPROM with the in-circuit reprogramming ability of
electrically erasable programmable read-only memory (EEPROM). Electrically
Erasable Programmable Read-Only Memory FEPROM allows in-service software
upgrades to be performed locally or remotely without replacing the SYSCTL
circuit pack. Program upgrades of remote DDM-2000 OC-12 shelves can also be
done via the overhead channel from the central office (CO). Of course, software
upgrades may also be accomplished by replacing circuit packs with packs that
have already had software upgrades.
RAM .
7
The main processor's random access memory (RAM) is used to store all
volatile information, such as system alarms, PM information, and parameters for
the main processor's operating system.
EEPROM .
7
All nonvolatile parameters, such as provisioning, are stored in the
EEPROM, which maintains its data indefinitely during a power loss.
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 ...