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Cisco 8851 Initial Boot Issue

Cisco 8851 Initial Boot Issue

Cisco 8851 Initial Boot Issue

Recently I have come across several brand new out of the box Cisco 8851 phones that will not boot past Cisco start screen.

CUCM System version:

Active Load ID out of the box seems to be sip88xx.11-0-1-11

Pushing Load ID sip88xx.12-7-0001-393 on connection to network

Any ideas or string of phone keying code to try on phone to shock or revive?

RE: Cisco 8851 Initial Boot Issue

Too big of a jump. Load a different 11.x firmware. Have them try to pull that. I think you might need a lower 12.x to jump to 12.7 too.

CCNA Voice
CCNP Voice

RE: Cisco 8851 Initial Boot Issue


Ok I have tried multiple things.

I have tried holding down the * key when connecting to the network to Reboot from the Backup Image - Doesn't pass

I have tried holding down the # key when connecting to the network to Reset the Phone to the Factory Settings from the Phone Keypad 123456789*0# - Doesn't pass

I have taken the MAC and copied from a working phone and lowered the LOAD to try boot - Doesn't pass

Any other suggestions or am I at the point where I chalk it up to RMA ????

RE: Cisco 8851 Initial Boot Issue

the firmware load is currupt - seeing as the phone is not even getting to the point where the network is 'up' (ie DHCP etc) the only solution is to have the phone hardware-repaired.

I have done loads of these, the number 1 fault with the 8811/41/51's. Unlike the good old 79xx series there is no low level boot loader built in as designed, so no recovery procedure at all.

I can't share how i go about fixing these but suffice to say it is a compnent level hardware repair.

all the best

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