CLOCK CARD This card is used in the 3600 Switching Shelf to provide the system clocking (Stratum-3) for the 3600 Multi Shelf System. One Clock Card is required per 3600 Switching Shelf.

Any questions?

Please use the following form to request information.

Please specify your question about CLOCK CARD This card is used in the 3600 Switching Shelf to provide the system clocking (Stratum-3) for the 3600 Multi Shelf System. One Clock Card is required per 3600 Switching Shelf. *

Type the numbers you see in the picture below