10-12-2018 01:12 PM
hi,
I have an ongoing problem with a Cisco 1921 router which we are trying to use Panasonic NT phones on.
There is a 1921 at each site, the phones register ok but we have no audio either way.
I am by the tech guys assured the relevant ports have been forwarded to the Panasonic telephone system and SIP ALG is disabled.
Anyone else come across this or a similar problem
10-12-2018 02:28 PM
Depends on your setup, show us your network topology ?
is there any NAT or VPN involved here ?
10-14-2018 03:40 PM
10-18-2018 07:20 AM
How are the NT 551 phones connected to the 1921 router?
Would it be possible to post the 1921 config as well as the output of "show inventory"?
Thanks
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