363-206-295
Circuit Pack Descriptions
7-22
Issue 1
December 1997
Fault Detection Circuitry
7
The TG circuit pack has in-service and out-of-service built-in test capability. In-
service testing is continuous and errors are reported when they occur to the
SYSCTL via the intra-shelf control bus. An out-of-service test is performed
whenever the TG circuit pack is inserted or recovers from a transient failure.
The incoming DS1 references are monitored for:
■
LOS (128 consecutive zeros)
■
DS1 AIS
■
LOF
■
Excessive out-of-frame count
■
Greater than 10
-3
bit error ratio (BER).
Power Circuitry
7
The TG circuit pack receives two sources of
−
48 volts which are diode ORed,
fused, and filtered prior to conversion to a +5 volt source to power the rest of the
circuit pack. A failure of the fuse or converter causes the red FAULT LED to light.
TG Hardware Settings
7
The TG circuit pack option switches provide the following functions:
■
DS1 Reference Line Coding — Selects either alternate mark inversion
(AMI) or AMI with bipolar 8-zero substitution (B8ZS) line coding for both
DS1 input and DS1 output.
■
DS1 Reference Format — Selects either super frame (SF) or extended
super frame (ESF) for both DS1 input and DS1 output.
■
Timing Mode — Sets timing mode to free run, external DS1, or line
(formerly loop) timed.
■
DS1 output mode — Sets DS1 output (SF or ESF "all ones" signal) for
intra-shelf timing derived either from DS1 external input or from network
timing distribution derived from received line. Reference for DS1 timing
output is taken from the main OLIUs.
■
Sets equalizer switch for proper cable length when provisioned for SYNC
OUT mode. Equalizer settings will be automatically set to shortest cable
length when the DS1 output is provisioned for MULT mode.
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 ...