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Unread 04-03-2009, 02:43 PM   #1
amroe
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Question Problem between two Voxalot users

Hello everybody , i had made 2 users at Voxalot one is 279863 and the second is 569508 , both are at eu server , when i call outside Voxalot network the voice is 100 % and i also try in both users to call 500 and 600 and working perfect , but when calling each other its one way voice call

please help me .
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Unread 04-04-2009, 08:29 AM   #2
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This could be a NAT traversal issue. What kind of IP phones and routers are being used on each end? Is either IP phone behind a symmetric NAT router?
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Unread 04-04-2009, 11:27 AM   #3
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Red face Answer to qustion

Both users use PAP2 devices , i don't know a lot about ( Nat ) how can i check that at this problem ?
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Unread 04-04-2009, 06:16 PM   #4
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The following settings should provide the correct NAT settings:

(under SIP tab)
Handle_VIA_received: yes
Handle_VIA_rport: yes
Insert_VIA_received: yes
Insert_VIA_rport: yes
Substitute_VIA_Addr: yes
Send_Resp_To_Src_Port: yes
STUN_Enable: yes
STUN_Test_Enable: yes
STUN_Server: stun.voxalot.com:3478 (or any STUN server such as 'stun01.sipphone.com:3478' or 'stun.sipgate.net:10000')
NAT_Keep_Alive_Intvl: 179

(The NAT_Keep_Alive_Intvl value 179 was chosen to be less than the NAT session expiry time of most routers.)

(under Line_1 and Line_2 (or PSTN_Line) tabs)
NAT_Mapping_Enable: yes
NAT_Keep_Alive_Enable: yes
NAT_Keep_Alive_Msg: (this setting should be left blank)
NAT_Keep_Alive_Dest: $PROXY
Register Expires: 3600

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At this point do another audio test. If the problem persists make the changes given below.
----------

1. In the routers on each end; forward the SIP ports and the RTP port range.
2. Set STUN Enable: no
3. Set NAT_Keep_Alive_Enable: no
4. In order for the ATA/phone to know it's public IP address, make sure the ATA/phone is registered with at least one SIP registrar, or enter your public IP address into the appropriate setting in the ATA (in Linksys ATAs this setting is EXT_IP).

If the problem persists at this point try using the Symmetric NAT option setting in your Voxalot account.
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Unread 04-05-2009, 04:09 PM   #5
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Thanks again BoatMan , Martin please add this to toturial its worked 100% and to let other users to benift from this .
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