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New Member

CUCM one side voice in Public network

Hello All,

CUCM Topology.gif

               Here i am explain my all topology and configuration please see it and tell me if any wrong with configuration

CUCM IP :- Public IP)

DHCP Server IP:-

Primary TFTP Server IP Address(Option 150):-

DHCP Subnet:-

IP Phone  0:-

IpPhone  1:- 

These are in a same network so both side voice .

IP Phone 2:-


Here IPphone 2 can hear but on IPphone 0 voice is not coming.

IP Phone 2:-

IP Phone 4  :-

Both side voice is coming.

So i have problem when any phone is registered with private ip then on it voice is not coming.when i check the sender/reciever packet

then it send the packet but no recieving.

Auto registration is enable.

Sir please tell me if i have any wrong in this configuration.

Thanks in Advance




Re: CUCM one side voice in Public network

As Ronak noted in your previous post, it will be an issue where the packet is not reaching the phones. I believe this could be a NAT issue or an ACL issue from the topology above. A ping test between the two networks will tell the tale. If the ping fails, you could start using traceroutes between the two networks to figure out where the packet is being dropped and rectify the problem.

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New Member

CUCM one side voice in Public network

Hello George,

                         When i did the traceroutes then i have packet loss from the other side.but what i can do for that please tell me so i can connect it.


CUCM one side voice in Public network

One thing i tell you that its a routing problem. Also, i wouldnt have the same subnet (192.168.1.x) at two different sites, if this is actually your IP schema. I would suggest you open a TAC case to figure it out as this cannot be fixed over the forums, IMHO.

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