Our phone system provider is going to be doing some work installing TSU 120s in to separate voice and data between our two branches, and I need to find out if the routers are providing the clock source, or if the T1 is providing it. How can I check that on the router?
Well, you need to see the 'sh run', 'sh int' and 'sh service-module' on both routers to check if there's something wrong with the settings, but from the problem description, I believe Telco ISP providing clocking.
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