Cisco ONS 15454 SDH Specifications download pdf (Page 130)

3-10

Cisco ONS 15454 SDH Troubleshooting and Maintenance Guide, R3.3

May 2002

Chapter 3 Card Reference

Timing Communication and Control (TCC-I) Card

provision any of the clock inputs as primary or secondary timing sources. A slow-reference tracking loop

allows the TCC-I to synchronize with the recovered clock, which provides holdover if the reference is

lost.

Install TCC-I cards in Slots 7 and 11 for redundancy. If the active TCC-I fails, traffic switches to the

protect TCC-I. All TCC-I protection switches conform to protection switching standards when the BER

counts are not in excess of 1 * 10

-3

and completion time is less than 50 ms.

The TCC-I uses a 10Base-T LAN port for user interfaces, being led via the back plane to the port

accessible on the front of the MIC-C/T/P FMEC.

Note Cisco does not support operating the ONS 15454 SDH with only one TCC-I card. For full

functionality and to safeguard your system, always operate in a redundant configuration.

Note CTC software does not monitor for the presence or absence of FMECs unless the TCC-I(s) card has

reached the active/standby state. During transitional states such as power-up or TCC-I reset CTC

ignores the FMEC inventory displayed in node view.

Note When a second TCC-I card is inserted into a node, it synchronizes its software, its backup software,

and its database with the active TCC-I. If the software version of the new TCC-I does not match the

version on the active TCC-I, the newly inserted TCC-I copies from the active TCC-I, taking about 15

to 20 minutes to complete. If the backup software version on the new TCC-I does not match the

version on the active TCC-I, the newly inserted TCC-I copies the backup software from the active

TCC-I, again, taking about 15 to 20 minutes. Copying the database from the active TCC-I takes about

3 minutes. Depending on the software version and backup version the new TCC-I started with, the

entire process can take between 3 and 40 minutes.

3.6.2 TCC-I Card-Level Indicators

The TCC-I faceplate has eight LEDs. The first two LEDs are card-level indicators.

3.6.3 Network-Level Indicators

The TCC-I faceplate has eight LEDs. Six LEDs are network-level indicators.

Table 3-5 TCC-I Card-Level Indicators

Card-Level LEDs Definition

Red FAIL LED This LED is lit during Reset. The FAIL LED flashes during the boot and

write process. Replace the unit if the FAIL LED persists.

ACT/STBY LED

Green (Active)

Yellow (Standby)

The ACT/STBY (Active/Standby) LED indicates the TCC-I is active (green)

or in standby (yellow). The ACT/STBY LED also provides the timing

reference and shelf control. When the TCC-I is writing to the Active or

Standby TCC-I, its Active or Standby LED blinks. To avoid memory

corruption, do not remove the TCC-I when the Active or Standby LED is

blinking.

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