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uk.telecom.voip (UK VOIP) (uk.telecom.voip) Discussion of topics relevant to packet based voice technologies including Voice over IP (VoIP), Fax over IP (FoIP), Voice over Frame Relay (VoFR), Voice over Broadband (VoB) and Voice on the Net (VoN) as well as service providers, hardware and software for use with these technologies. Advertising is not allowed.

The best way to do a voice message at specific times, on a VOIPsystem?



 
 
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  #1  
Old December 14th 19, 11:57 AM posted to uk.telecom,uk.telecom.voip
David Woolley
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Posts: 113
Default The best way to do a voice message at specific times, on a VOIPsystem?

On 13/12/2019 18:14, Peter wrote:
To avoid open ports, the phones*could* call the A&A server and then
keep the session open, which would be nice because then you could just
plug in such a phone into any DHCP-enabled router/switch, but I
suspect they aren't doing that.


You can only get anywhere close to this with SIP for the signalling.
The RTP ports still need to be open. A router can dynamically open
these by watching the SIP signalling, but router implementations are
often broken.

Redirecting this to uk.telecom.voip.
  #2  
Old December 14th 19, 04:11 PM posted to uk.telecom.voip
Andrew Benham
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Posts: 302
Default The best way to do a voice message at specific times, on a VOIPsystem?

On Sat, 14 Dec 2019 13:27:40 +0000, Peter wrote:

David Woolley wrote

On 13/12/2019 18:14, Peter wrote:
To avoid open ports, the phones*could* call the A&A server and then
keep the session open, which would be nice because then you could just
plug in such a phone into any DHCP-enabled router/switch, but I
suspect they aren't doing that.


You can only get anywhere close to this with SIP for the signalling.
The RTP ports still need to be open. A router can dynamically open
these by watching the SIP signalling, but router implementations are
often broken.


Our router certainly won't be doing that. It is a "business level"
Draytek (well, to the extent that anything chinese is "business level"
) and it doesn't do any of that, including PnP for opening ports.


AAISP's firewall recommendations for their VoIP service are at:
https://support.aa.net.uk/VoIP_Firewall
  #3  
Old December 15th 19, 12:28 AM posted to uk.telecom.voip
David Woolley
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Posts: 113
Default The best way to do a voice message at specific times, on a VOIPsystem?

On 14/12/2019 16:11, Andrew Benham wrote:
AAISP's firewall recommendations for their VoIP service are at:
https://support.aa.net.uk/VoIP_Firewall


The ports that need to be open are determined by the local software, not
the service provider, unless you firewall outbound traffic.
 




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