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My iphones are not working well on wan network

i am a user of cisco packet tracer 5 or somewhat onwards. i have made a project in this using router 1841 , frame realy (or cloud), switches 2950-24, ip phones and computers(i.e pc or laptop). i am connecting  my network using EIGRP protocol.

the problem is coming in my iphones beacuse when i a trying to call from one network to another it shows error of wrong no and ip phones are calling to same network. the Euigrp is working well because when i am trying to ping each and every ip phones they are pinging so know help me please.

please remove the error from project and tell me what changes you have done.

my project is attached with it.

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