363-206-295
Technical Specifications
Issue 1
December 1997
10-7
Long Reach OC-3 Interface (21G/21G-U/
21G2-U OLIU)
1
0
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Optical Specification
The 21G/21G-U/21G2-U OLIU photonics meet or exceed SONET
specifications (TR 253, Iss. 2 - LR-1 MLM category). The multilongitudinal
laser transmitter supplies an non return to zero (NRZ) coded signal. The
PINFET receiver allows direct optical loopback without the use of an
external attenuator, when the TRANSMIT POWER switch is on the low
setting.
The 21G/21G-U/21G2-U long reach OC-3 interface supports span lengths
up to 55 km, assuming 0.45 dB/km single-mode fiber (including splices)
and the span engineering rules outlined in Figure 10-1. Transmit and
receive powers are referenced to points S and R as shown in Figure 10-1.
Table 10-5 and Table 10-6 provide detailed specifications and link budget
information for the 21G/21G-U/21G2-U OLIU.
Figure 10-1. Optical System Interfaces (Points S and R)
■
Alarm Thresholding
The following parameters are monitored at the OC-3 interface.
— LOS
— LOF
— LOP
OLIU
Point S
Transmitter
(Tx)
Transmitter/Connector
Assembly
Station Cable
Fiber
Crossconnect
Fiber
Crossconnect
Outside Plant Cable
Connections
OLIU
(Rx)
Assembly
Station Cable
Receiver
Receiver/Connector
Point R
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 ...
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Страница 565: ...RTRV OC3 3 of 3 Page RTRV OC3 COMMANDS RELATED rtrv sync 11 148 1997 December 1 Issue OC 12 DDM 2000 ...
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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 ...
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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 ...