This happens to me from time to time and I was wondering if someone can explain why.
When I try to upload my phone firmware, I download the zipfile, unzip and drag the .bin file to the UC540 icon in CCA 3.1(1). The TFTP upload begins then fails after a few minutes stating:
Error: File Upload For input string: "bt".
Error: File Upload For input string: "SPA525".
I have a feeling it might have something to do with my tftp connectivity but I can ping my loopback network (10.1.10.2) from the admin machine (server 2003) and from the UC540.
I am using the latest IOS and the phones in question are the SPA525G2s. Shortly before this happened I uploaded new firmware for my SPA504Gs using the same method and it worked without error.
Thanks is advance.