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Control, Transmission, and Synchronization Interfaces

Issue 8.0 July 2002

5-9

FT-2000 OC-48 Repeater Bay 5

The FT-2000 OC-48 Repeater Bay regenerates optical OC-48 signals for up to six

OC-48 high speed lines. Figure 5-4 shows a transmission block diagram of the

FT-2000 OC-48 Repeater Bay for one 1x1 system.

Two OC48 Regenerator (OC48 REGENR) circuit packs make a repeater. One

OC48 REGENR circuit pack receives an incoming OC-48 signal from high speed

line 1W, for example, and transmits it toward high speed line 1E. The other OC48

REGENR circuit pack receives an incoming OC-48 signal from high speed line 1E

and transmits it toward high speed line 1W.

Internally, the FT-2000 OC-48 Repeater Bay employs standard synchronous

multiplexing. (Refer to Appendix A, "A SONET Overview.") For example, the

incoming optical OC-48 signal from high speed line 1W is converted to an

electrical STS-48 signal and demultiplexed to sixteen 155 Mb/s signals. This

allows certain SONET section overhead bytes to be extracted, monitored, and

controlled. The 155 Mb/s signals are then multiplexed to one STS-48 signal, and

the SONET section overhead bytes are inserted. The STS-48 signal is then

converted back to an optical OC-48 signal for transmission on high speed line 1E.

Figure 5-4. FT-2000 OC-48 Repeater Bay Transmission

Block Diagram

REGENR

OC48

OC-48

REGENR

1E1W

OC48

OC-48

Lucent Technologies FT-2000 OC-48 User Manual

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