Paging not working for all ip phones randomly (UC560)(8.1)

Hi All

I have a UC560, CME version 8.1 with 20 phones, some phones are SPA504 (7.4.8a)
 and others are SPA525G2 (7.4.9a)

Here it is the paging-dn config:

ephone-dn  1
 number 101 no-reg primary
 description IP-Paging1
 name Office Page
 paging ip port 2000

The strange behavior I get is that not all phones are receiving the paging and this occur randomly between phones, sometimes one phone works fine and sometimes it doesn't.

Thanks for any help
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What is the network look like, what switches are being used. Is data being shared on the same lan? Can you get a wireshark trace? Specifically I'd like to have three wireshark on the drop of a phone that consistently fails. This might tell us if network congestion is blocking the packets. Since this traffic is UDP out is a best effort so if the network can't get the invite packet to the phone the phone can't participate.
itpointeAuthor Commented:
Hi all,

The issue was solved by configuring the paging in multicast mode,then create a new CNF-file and finally reset all phones.

Thanks for everything

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itpointeAuthor Commented:
The issue was solved by configuring the paging in multicast mode,then create a new CNF-file and finally reset all phones.
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