[asterisk-users] strange SIP-SIP delay

[Steve Totaro]

On Tue, Jun 17, 2008 at 11:39 AM, Julian Lyndon-Smith <asterisk at dotr.com> wrote:
> I've got the following setup:
>
> PhoneA ->
>  router ->
>   vpn ->
>    router->
>     asterisk (SIP / ISDN)
>
> PhoneB ->
>  asterisk (SIP / ISDN)
>
> If phone A is connected to phone B (sip-sip), there is a noticable delay
> (up to 2-3 seconds) between me speaking and the other end hearing.
>
> If phone A calls out via the ISDN and back in  to the DDI of phone B (ie
> SIP->ISDN->ISDN->SIP) then there is no delay at all !
>
> Any clues on where I might start looking for this ?
>
> Julian
>

Have you tested the latency across your VPN?

Thanks,
Steve T