I have a 7960G phone that has a bad tftp server defined. After it boots, 'Protocol Application Invalid' is displayed. How do I go about resetting the configuration? Do I need that special RS232 cable? If so, what are the pin-outs, and can I simply use Hyperterminal or similar?
I have had a hard time with some phones displaying this message too. I reset everything to factory default. You have to interrupt the boot process of the phone, unlock it, reset the config. Sometimes it helps if you delete the phone from your CCM and recreate it.
You could also try giving the IP phone a STATIC IP address and a STATIC IP reference for your TFTP server, rather than let it discover it through DHCP. There is a troubleshooting doc that also references the "Protocol Application Invalid" out on Cisco's site. Here is a link:
This document is an early notification of a behaviour change that will be introduced in IOS XR release 6.5.
IOS XR configuration principles relevant for this article are:
On router platforms all interfaces must be by defaul...
With XR 4.2.0 the ASR9000 is releasing a new line of hardware models. This amongst others is the RSP440, the next generation RSP with faster switch fabric along with Typhoon based Linecards, the next generation network processor.
The Cisco EPN system incorporates a network architecture designed to consolidate multiples services on a single Multiprotocol Label Switching (MPLS) transport network. This network is designed primarily based on Application ...