Jump to content











Photo
- - - - -

TFTPD32 with Cisco Phones (Option 150)


  • Please log in to reply
No replies to this topic

#1 strangel

strangel
  • Members
  • 1 posts
  •  
    United States

Posted 27 April 2007 - 09:33 PM

TFTPD32 is a fantastic utility- TFTP server and DHCP all in one- this makes it a great recovery/upgrade tool for most models of Cisco Phone with one caveat- DHCP Option 150. When a Cisco phone pulls DHCP it looks to Option 150 for an IP address of a TFTP server to start the boot/upgrade process.

TFTPD32's Option field is an ACSII one, and putting an IP address in here is useless and will only confuse the phone as it it will be passed as a string instead of a usable address.

Workaround:

put the IP address for option 150 into the ascii field as a reverse HEX address like 0xfd01a8c0 == 192.168.1.253

Works like a charm!

Maybe Philippe will one day put some kind of a toggle in (hint, hint) so we can enter IP addresses directly- but until then, use the simple workaround!

Thanks for a great utility Philippe!

Jim




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users