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How to dial localy remote site phones registerd to uc520 to main office cucm 8.0

Hi i have a site with CUCM 8.0 IN UAE and got another site in Nigeria where connected with VPN for data network access .

Nigeria branch has got UC520-32U-8FXO-K9 and some SPA525G2 , SPA504G .SRW248G4P-K9-EU switch and juniper firewall .

Now the Nigeria phones are registered with local UC520 there and dialing local no's and towards UAE they dial through PSTN .

Now they want to dial to the main office in UAE and from main office to Nigerian office via VPN .

So which is the better way of configuration ,  by sip trunk will both place supports that or is there any other better solution there .

Can anybody help me out on this . Thanks..!

Breeze Joseph Kuriakose Sr Network Engineer
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hi Breeze,

If I understand your question correct..... you have a callmanger 8.0 is in UAE  &  a UC520 in Nigeria  and want to dial from Negeria (UC520)  to  UAE (callamanger)   .   Now since you have ip connectivity between the 2 sites.

You can use any 1 of the  2 solutions....

1>Add a sip trunk to the callmanger  point it to the UC520   and then configure a couple of  sip dial-peers depending on your dial plan to reach the callmanger .

2>add the UC520 to the callmanger as a h323 gateway or just have a trunk from callmanger to the UC520 and  configure H323 dial-peers on the UC520 to send the call to the callmanger.

Hope this helps!

Thanks,

Karthik

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Dear Karthik ,

Thanks for the response..

I have a doubt that when we configure sip trunk from uc520 to cucm , then the same sip trunk should be reverse from cucm to uc520   OR  as you said it should be H.323

Breeze Joseph Kuriakose Sr Network Engineer
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hi Breeze,

Yes use the same sip trunk even in the reverse direction.(solution1)

H323 is only for the solution 2 as I earlier mention.

Hope this helps!

Thanks,

Karthik

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Dear Karthik ,

Thanks for the informatino..and i have one more doubt in that.

they have site to site 2 mbps VPN configured on 3rd party ARRAY(FORESCOUT) and they have Juniper firewall .

Do we need to do any configuration on array or the firewall . or i just have to make sure from CUCM to UC520 its

reachable .

Breeze Joseph Kuriakose Sr Network Engineer
Highlighted

hi Breeze,

Yes  see that there is reachability . As far as the firewall is concerned make sure the sip ports  and the rtp ports are open  for sip and rtp traffic.

Hope this helps!

Thanks,

Karthik