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Problem with blocked fxs on Cisco 1750

I have network in star topology. Central office - 3640 with fxs , branch offices -1750 with fxs. Links are relised on frame-relay. Sometimes it happens that fxs is blocked ( only on 1750)- if I pick up the phone, there is no signal ( port status is off hook).If someone wants to call to this branch, he will hear busy signal. It doesnt happen on 3640. What should I do to improve this situation. Version of IOS on 1750 - 12.1(5).

1 REPLY
Anonymous
N/A

Re: Problem with blocked fxs on Cisco 1750

I would recommend you upgrade to 12.2 release and log the error message if problem persists and there's any.

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