IP Phones not getting registered!!

[hari2578]

Hello All,

We have a new installation for BCM 400 4.0...

The BCM is given a public IP..and the phones need to registered from a remote site using private IP's, which is connected to the main site(where BCM is sitting) on a dedicated fiber link..(via router).. THe customer says they have no tunnel VPN, nor NAT.. but still most of my IP Phones 1140E(f/w:0625c6j) are not getting registered...

They are having DHCP..

also the phones which are getting registered are not giving any dial tone, ringback tone...

any help guys???

 

[RYLSFAN]

my thoughts...

you have given the server a public ip and the phones internal addresses. make sure the phones have the proper gateway and subnet to look to an external source for the S1. May have to make a rule in your router?



Thats not my fastball, thats my hurry up and get by you pitch... Satchel Paige

 

[Frideo]

If the BCM has a public IP and the phones have private IPs, then what routing decisions are being made?
To me, that seems like a fairly unusual setup. Can you really be sure there's no NAT?

Can you tell us the IP address, subnet mask and gateway of the BCM and of one of the problem phones?
I've dealt with plenty of routing problems like this, so I may see the problem.

Are you able to try connecting a laptop with the same IP details as the IP phone, where the phone is, and see whether you can ping the BCM, etc?
Do you have a softphone you can test on the laptop?

Also, audio problems with IP point to possibly routing problems. Are you sure that the IP phones can route to each other (not just to the BCM) when making phone calls?

Are you able to see any difference in the setup of a phone that works and one that does not? That could be a good clue. Are they on the same subnet or on the same physical LAN?

 

[madwok]

Many things could go wrong here :

NAT/PAT , acl , firewall rule etc.

 

[biv343]

I would investigate using some type of hardware based VPN so you can get the public IP off the BCM. Way too much security risk in my opinion having the system sit fully exposed on the Internet. The fact that some phones register and don't get dialtone makes me think that somewhere there is NAT/PAT, etc in the network.

 

[Boomarang]

Build VPN between the two networks!!! Then assign private addresses to the BCM and Clients with routes to each network in the routers. This will require work/learning upfront, but will save so many headaches in the long run.

Been there, done that. Build the network properly!!!