Hi everyone,I have an ISR 4431 with CME 14.1 installed and I managed to get a intercom/trunk (hotline) working on a CP 6901 (SCCP) in telephony service, but i couldn't manage to get it on a CP 7821 (SIP) because i get the message " Can't configure in...

Hi everyone,I have an ISR 4431 with CME 14.1 installed and 2 IP Phones (Cisco 7821). The phones are getting an IP from the DHCP server but aren't registering.I've attached the configuration file, a debug file and pictures of the phones.I've tried fac...

Hi everyone,I am trying to expand my existing VoIP network that uses a CUCM 11.5  to another location using a newly bought CISCO isr4331/k9 but I've never configured an isr4331/k9 and don't know how to proper make use of it.I need to install 80 Cisco...