[cisco-voip] Remote 7961 Phone at Someone's House - Notes for Setup!

[Jason Aarons (US)]

I think the Cisco SE was reading from the Teleworker SRND, which notes
Cisco internally used both G.711 and G.729.

 

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Steve Miller
Sent: Wednesday, October 25, 2006 11:46 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Remote 7961 Phone at Someone's House - Notes for
Setup!

 

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 running 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
one 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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