CWDM-Cisco....does it synchronise?????

Question

I have a cisco 7609 router at our larger POPs on which terminates a CWDM ring. To this 7609, are connected 7606s at our smaller POPs again through a CWDM ring of ADVA FSP 2000. The CWDM device is from ADVA optical networking known as FSP 2000. These CWDM devices are in Ring fashion and are located in every other smaller POPs on which 7606 routers are connected. I have a WS 6724 card in 7609 router on which CWDM ring terminates at larger POP. Now the problem here is that some of the ports on this card are not getting activated and are DOWN. Whereas the status of ports on 7606 (GE-WAN ports on OSM card) at my smaller POPs is UP. But I'm not able to reach from 7606 at my smaller POP to 7609 at my Larger POP. ADVA says that there's no problem with their device.Could someone please let me know the reason behind this?
To be very precise and clear, all these POPS were running well earlier.
Thanks,
NISHA

Answer 1

Hi
i would recommend u to go thru this testing procedure...
it may help u out to fix ur probs...
1. Check that the local 2TCM interface is administrative "up" on either locations
2. Check that the local 2TCM interface speed is set to "1250" on either location
3. Check that each local receiver detects a valid signal from CISCO - optical readings shall fall in the range between -16 dBm to -3 dBm
4. If L/R in location A is turned on green, the corresponding L/T on location B becomes active, so L/T turns green - check output power rigth after the L/T and do the same measurement just in front of the CISCO GBIC receiver to include the patch cord.
5. If L/R in location B is turned on green, the corresponding L/T on location A becomes active, so L/T turns green - check output power rigth after the L/T and do the same measurement just in front of the CISCO GBIC receiver to include the patch cord.
6. If step 1 to 5 answers is "yes" and measured values fully inline with our specification but the CISCO link still cannot be established, swap to the second port of the 2TCM. Redo steps 1-5 and confirm behaviour on second port of the 2TCM card pair.
7. If still no communication between the CISCOs, place a loop cable with 20dB attenuation between R/T and R/R of the 2TCM in location A and check if the CISCO can "see" it`s own signal.
8. Place a loop cable with 20dB attenuation between R/T and R/R of the 2TCM in location B and check if the CISCO can "see" it`s own signal.
regds