PSTN one way calling issue

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Nov 6th, 2009
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What could be the concern for one way calling issue between IP communicator & PSTN


cust when using the IPC thru his WAN connection( MPLS cloud) or Wifi connection when in office located in Russia to UK;cust has one way calling issue

When he connects VPN secure Client R56 NG, which has secured tunnel till UK where callmanager,GW r placed then customer still complains for one way calling issue for PSTN Line

Now when cust access thru UK location, then he donot have one way calling issue with PSTN

Note: When customer tried in Russia office, then his other colleague aslo tried,his collegaue hsd similar issue.

Could upgrading the VPN client to latest version could be helpful? or do i need to check the configuration on GW side, as since i donot have access to GW so i need proper justification to get it, pl suggest


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KonradStepniewski Fri, 11/06/2009 - 04:57
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One way voice issue mostly is related to firewall settings or routing problems.

I would start first there.

navingolani Fri, 11/06/2009 - 05:05
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Checked with the customer, ther r no local firewalls installed on his system

paolo bevilacqua Fri, 11/06/2009 - 09:26
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What that means, the VPN is not really transparent, somewhere UDP packets are dropped.

These are typically the ones going from client to to hub.

So you have to fix the VPN or replace it with something that really works.


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