If you are planning to deploy a lot of these setups you should ask your SE
about the phone proxy product.

http://www.cisco.com/en/US/products/ps7057/index.html



On 10/25/06, Steve Miller <millerman1@cox.net> wrote:
>
>  The following is information that I have rec'd regarding the installation
> of a 7961 at someone's house who is using cable or DSL.  Is there anything
> else that we might need to think about?  Thank you!
>
> Notes from cisco Engineer:
>
> The remote equipment at the home office would consist of a cisco 871
> router and a cisco phone with a power block.  The cisco 871 would function
> as the home office's firewall and router (and would connect to either a
> cable modem or a DSL modem depending on the site).  The router would be
> configured to have an IPSec tunnel back to the office network (most likely
> configured off of your existing concentrator).  The remote cisco 871 would
> be configured with DHCP and have the TFTP scope option set to tell all
> devices the IP address of the Call Manager server (note the router has a
> built-in four port switch).
>
>  At that point, the IP Phone would register normally to the Call Manager
> servers using the IPSec tunnel as it's communication path.  The keepalives
> from the phone to the CM servers would keep the IPSec tunnel up and runnin
g
> 24/7.
>
>  The restrictions on this type of deployment are:
>
>                         -must use G729 codec due to bandwidth restrictions
>
>                         -extremely limited QoS control since we are going
> across the Internet
>
>                         -security policies need to be visited since the
> remote office would have access to the corporate internal network (this on
e
> is a biggie)
>
>                                     -sub-issue regarding calling from home
> office to home office.  This is doable but adds additional security and
> deployment issues.
>
>                         -need to consider the standard IT management
> overhead associated with supporting home equipment.
>
>
>
> Thank you!
>
>
>
>  ________________________________________
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>
>
>

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