363-206-295
Applications
2-18
Issue 1
December 1997
DDM-2000 OC-3, OC-12, and FT-2000 OC-48 Lightwave Systems can be
configured to offer this topology. Often the DDM-2000 equipment is used for the
loop feeder access ring, and the FT-2000 OC-48 Lightwave System equipment is
used for the interoffice ring. Figure 2-11 shows a DDM-2000 OC-3 (or OC-12)
path switched ring interworking with an FT-2000 OC-48 Lightwave System
bidirectional line-switched ring.
In this application, the DDM-2000 provides an appearance of loop traffic at both
the primary and secondary nodes by dropping traffic at the primary node and
simultaneously continuing it on to the secondary node. This capability is called
"drop-and-continue." The DDM-2000 OC-3 Multiplexer allows DS1 signals to be
multiplexed for handoff at an economical EC-1 or OC-3 rate in the COs. Also, the
DDM-2000 OC-3's flexible TSI can be used to prepackage all DRI protected DS1s
into a single EC-1 for economical handoff to the OC-48 ring. This capability allows
for the easy mixing of DRI and non-DRI services on the same ring network. In this
way, only specially tariffed services need to be configured for the extra reliability
that DRI provides. DS3/STS1 clear channel services are also supported. The
companion FT-2000 OC-48 Lightwave System ring picks up the traffic at these two
nodes and carries it to the destination node, unless a failure condition causes a
protection switch to the secondary signal. In the reverse direction, a similar
process is followed with the OC-48 ring handing off the two copies of the signal at
the primary and secondary nodes and the OC-3 ring providing the switching at the
destination node.
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 ...