Phone doesn't register to CUCM

[tazi mahmoud]

Hello,

I have an architecture where ip phones and  CUCM are in two separate networks trough Juniper Firewall

Ip phones : 30.30.30.0/24

CUCM : 172.18.1.65/24

DHCP is configured on Juniper Firewall and it delivers option 150 which is CUCM's ip address

ip phones get all parameters from dhcp server but don't get registered to CUCM

i tried an ip communicator and it works it got registered to CUCM

Please advise

[Jaime Valencia]

Are all the necessary ports open??

[tazi mahmoud]

To be sure i permit any to any from ip phones to cucm networks and from cucm to ip phones networks 

[Jaime Valencia]

OK, are the phones already configured in CUCM??

Or do you have auto-registration enabled?

[tazi mahmoud]

I tried two possibilities 

Phone already configured on call manager and new phone with auto registration enabled

An ipcomminicator works with auto registration but any other ip phone works (7821,8851,8845,7931) work 

[Jaime Valencia]

I don't understand what you mean here:

An ipcomminicator works with auto registration but any other ip phone works (7821,8851,8845,7931) work 

Assuming you meant to say those do NOT work, you'll need to drill down to sniffer traces and debugs to find out if the registration attempts are making it to CUCM, or not.