Cisco 7945G Rebooting while trying to upgrade

[RCBA_ADMIN]

Hi to all,

I have a Cisco 7945g a friend gave me as he gave up trying to upgrade it so now its my go

I have a tftp server setup as a dhcp server and the phone connects directly to the computer

I am upgrading the phone to sip firmware 8.5.2 unfortunately I do not know what version it is currently on all I know is it is currently using SCCP

What happens is the phone connects fine, gets the ip address then starts to download the term45 file and then just reboots

Not sure why hopefully you guys know

[Nithin Eluvathingal]

1. Unplug Ethernet & power cable (if applicable) from the back of the phone. 
2. Press and hold the # (Pound/Hashtag) key and plug the Ethernet & power cable back in.
   *****Note: Once the Headset, Mute & Speaker buttons flash in sequence it is safe to release the # (Pound/Hashtag) key and promptly enter the reset key sequence​​​​
3. Press in order 123456789*0# to begin the reset sequence. 

Reset the phone using above steps and try to load the firmware. 

[RCBA_ADMIN]

Unfortunately it just comes back up with the upgrade screen 

[RCBA_ADMIN]

Heres what it is doing

[Nithin Eluvathingal]

I hope your upgrade file is on your laptop. So run TFTP applications on your laptop and keep the firmware files on the TFTP folder and on DHCP configure option 150 as your Laptops IP address. 

Use ZIP firmware File. 

[RCBA_ADMIN]

Just to upgrade it I have the ethernet cable coming out of my computer and connected directly to the phone no switch or anything else

then the tftp server acts as a temporary dhcp server

[Nithin Eluvathingal]

You need a DHCp server and configure option 150 IP as your laptop IP. without that phone won't take the new firmware. 

[RCBA_ADMIN]

How would I do that?

[Nithin Eluvathingal]

You need a switch.

Put the phone and pc on same Vlan

Configure DHCp pool With option 150 as your Laptop IP address. 

Run TFTP application on your laptop and keep the Firmware files on the TFTP folder. 

[RCBA_ADMIN]

The computer and the phone are not connected to a network

the cable comes out of the computer and into the phone and that connects them

[Nithin Eluvathingal]

The phone need an IP and TFTP address either statically configured or by DHCP. With out the TFTP address information the phones is not going to download  the firmware. 

You cant make this   working just by connecting the phone to your computer. 

[RCBA_ADMIN]

The TFTP application replicates a dhcp server the phone is allocated a ip address by the tftp server

[RCBA_ADMIN]

The phone is getting a ip address

[Scott Leport]

Hi,

Unless I missed it, it may help telling us what you're trying to register your phone to. Is it CUCM or CME?

[RCBA_ADMIN]

I am trying to connect to a sip pbx system but right now I am just trying to update it

The phone starts downloading files the reboots almost immediately

Thanks