muted conference calls on SIP dropping out after 2 minutes 1

[yb09hvn]

hello all,

any ideas on this....IPO 500 V2 with 8.0 (53) software and SIP trunks.

when they dial in to a conference bridge and then mute the call out, it disconnects after two minutes. the sip host tells me there is a 2 minute timer on IPExchange that will end a RTP session if it appears to be quiet.

I've checked the obvious (rtp keepalives, periodic timeout less than 120 secs, re-invite supported checked, PRACK/100rel supported checked) but calls still drop when on mute.

could this be their firewall, or should I keep looking at the IPO?

thanks in advance,
cupov

 

[Seacats]

If you set the RTP keepalives option to be 119 seconds or less, have you associated the SIP line with the network topology information so that it follows this?

Line -> SIP Line -> Transport Tab -> Use Network Topology Info* -> Select LAN1 or LAN2 from drop down (depending on interface used).
*If you have Use Network Topology Info set to none it won't use the RTP keepalives setting you configured.