I configured a CME with SCCP phones (6921 and 8941) under TelephonyService and 3py SIP phone under voice register global on CME 9.0 (IOS:
Audio and video calls works successfully betwwen SCCP and SIP phones but I'm not able to send DTMF from SCCP to SIP when SIP phone dial SCCP extension while when SCCP call SIP extension everything is working.
This is my config:
voice register global
source-address 10.13.0.248 port 5060
bandwidth video tias-modifier 500000 negotiate end-to-end
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The short answer is that you don't.... That isn't entirely true while at
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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 ...