[Asterisk-Users] Semi-Ot - Cisco IP Phone Password Reset Procedure

[Cory Andrews]

.........
Our first problem dealt with the configuration being locked into the 
phones. We could view the settings, but could not change them without a 
password. Also, the phones are set with a Static IP address.  To 
overcome this problem,  create a default Configuration file with a 
password that you know and an image that would upgrade the phones firmware.
         Set up a laptop, running an TFTP program with all the Images 
and configuration files from the Call Manager and set it to the address 
of the TFTP server address the phones were looking for. Using a router, 
in our case a 2610, with an NM-4E, I set one address in the router as 
the gateway from the TFTP server address.

Example, The phones are set to look for a TFTP address of 192.168.0.10. 
The Laptop is set with this address and a gateway of 192.168.0.1. One of 
the ports on the router is set at 192.168.0.1 and connected directly to 
the laptop.

     The second port is set to the IP address that the phones are set 
to. Example, The phone's IP address is 198.162.10.152 with a gateway of 
198.162.10.1. Setting another port on the router to this gateway as 
well, 198.162.10.1 and connecting it to a switch created a mock network 
from whence the phones first were configured.

      Once this is all set, hooking the phone up to this mock network 
will cause the phone to contact the Laptop as the TFTP server and 
download the new config and firmware. Once the phones complete the 
firmware upgrade, the password will be set to what the default 
configuration password was set to. Most cases is "cisco", but can be any 
password set in the default configuration.

    From there, the phones configuration can be physically changed on 
the phone and set to your normal TFTP address and Call Manager. If your 
default firmware is different than the one already existing on the 
phone, it will follow it's normal upgrade procedures again and register 
to the Call Manager.

Cory Andrews
Partner / Purchasing
VOIPSupply.com
++++++++++++++++++++++++++
454 Sonwil Drive
Buffalo, NY 14225
++++++++++++++++++++++++++
v - 800.398.VOIP Ext 22
f - 716.630.1548
e - Cory at VOIPSupply.com 

-----Original Message-----
From: Shaun Ewing [mailto:sewing at gmail.com]
Sent: Thursday, July 21, 2005 7:52 PM
To: Cory at voipsupply.com; Asterisk Users Mailing List - Non-Commercial
Discussion
Subject: Re: [Asterisk-Users] Semi-Ot - Cisco IP Phone Password Reset
Procedure


On 7/22/05, Cory Andrews <Cory at voipsupply.com> wrote:
> Has anyone come up with a way to reset the password on a Cisco IP Phone
> when the normal password reset procedure does not work?  I have some
> phones that are running MGCP, and the password for the phone was
> assigned in the original config file TFTP'd to the phone.

Can you TFTP a new configuration to the phone?

If it's using DHCP and doesn't have a TFTP server explicitly defined
(and you have a DHCP server that supports it), you can send the phone
a TFTP server address using DHCP options 66 and 150.

-Shaun