I offer firmware for Cisco 6921 SCCP phones in the CUCM 8.5 SCCP69xx.9-3-3-2-SR1 configured in device defaults. CUCM System version: 126.96.36.19900-21.
Only seven Cisco 6921 phones, only in one site of my company stopped working suddenly. There were registered but without dial tone and you couldn't dial. I have more than two hundred Cisco 6921 SCCP phones configured.
I performed a workaround to resolve this issue configuring SCCP69xx.9-0-3-0 in phone load name, restarting Cisco TFTP service and then restarting the phones but I can see in one phone that:
App Load ID
Boot Load ID
I don't understand why app load id after configuring SCCP69xx.9-0-3-0 is different from the phone firmware configured.
I'd like to know the main causes of this firmware problems and practical knowledge working with firmwares in Cisco phones.
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The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
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Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...