Avaya IP Line Bedienungsanleitung PDF herunterladen (Seite 711)

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Appendix A: NAT router requirements for NAT Traversal feature Page 711 of 770

IP Line Description, Installation, and Operation

Confirm using IP Phone

The NAT router uses a cone NAT if no error message is displayed when the

IP Phone registers to the system. The NAT device does not use a cone NAT

if the IP Phone behind it displays the following error message:

NAT Error! ITG3053

Please try upgrading firmware on the NAT device or

replacing it with a different NAT device that has a cone

NAT implemented.

Time-out configuration

Confirm using natcheck

Time-out configuration cannot be performed using natcheck.

Confirm using IP Phone

If the IP Phone connection times out and the IP Phone reboots, use LD 117 to

lower the NAT Keep Alive Timer value on the Call Server. The reboots could

indicate that the NAT device’s address/port mapping is being cleared because

there is no message traffic from the IP Phone. By lowering the NAT Keep

Alive Timer value in the Call Server, keep-alive messages are sent more

frequently to keep the mapping “alive”.

>ld 117

->chg nkt 20

If lowering the NAT Keep Alive Timer value to the minimum value of 20

seconds doesn’t stop the time-outs, try replacing the NAT device.

Hairpinning

Hairpinning occurs when an IP Phone behind a NAT router can send packets

to the Public IP address and Port of another IP Phone connected to the same

NAT router. Determine if hairpinning is supported on the NAT router.

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