[cisco-voip] CUCM 9+ and SIP trunk provider w/o CUBE

[Nathan Richie]

I agree with Ryan on this one.  If you do not have the CUBE, your provider
will have basically have full IP connectivity into your network.

Regards,

Nathan Richie
CCIE No. 27910
Consulting Engineer
boice.net
700 Pearl Street/New Albany/ IN/ 47150
(502)271-2139 ­Single Number Reach
(502)271-2100 ­24x7x365 Emergency Assistance


On 8/12/14, 21:47, "Ryan Ratliff (rratliff)" <rratliff at cisco.com> wrote:

>If your provider is acting as a SIP registrar you will certainly need a
>CUBE, and to be honest I'd recommend it anyway just so you don't have to
>allow UCM and phones direct connectivity outside your network.
>
>http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/coll
>ab10/trunks.html#pgfId-1363704
>
>> When connecting to a service provider's IP PSTN network, Cisco strongly
>>recommends the use of the Cisco Unified Border Element as an enterprise
>>edge Session Border Controller to provide a controlled demarcation and
>>security point between your enterprise and the service provider's
>>network. 
>
>-Ryan
>
>On Aug 12, 2014, at 7:41 PM, Robert Blayzor <rblayzor.bulk at inoc.net>
>wrote:
>
>I am planning on replacing an again CallManager deployment with SCCP
>phones with a new CUCM 10.x and SIP phones.
>
>Our service provider can provide all of our trunking and PSTN
>connectivity via a direct SIP trunk, so I no longer need a PSTN gateway
>or PRI card, etc.  (or at least I should not).
>
>We will be peering SIP from the CUCM to our providers SBC, so the
>question begs to ask on our side is a CUBE absolutely required to make
>this work?  Pros/Cons?  I'd rather not have to add a CUBE in if I don't
>have to.
>
>Since the phones are native SIP as is the CallManager I'm trying to
>understand why a CUBE is required? (or is it not?)
>
>TIA
>
>-Robert
>
>
>
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