Network Address Translation Traversal - Avaya 1110 Fundamentals

IP Phone diagnostic utilities
Figure 99: QoS statistics data display page
In Figure 99: QoS statistics data display page
• EndIP = endpoint IP address
• PortID = port ID
• PacketTx = RTP packets sent
• Packet Rx = RTP packets received
• DPacketRx = BTR Disorder packets received
• PacketLossRx = packet loss received xxx%
• JittAveRx = jitter average received xxxxxx
• JittMaxRx = jitter maximum received xxxxxx
• RdTripDelay = round trip delay
Each new call resets the counters.

Network Address Translation Traversal

This section describes the Network Address Translation (NAT) Traversal feature as it effects
IP Phones. NAT Traversal is required to permit IP Phones working behind a NAT box to connect
and maintain signaling and media paths.
NAT Traversal is applicable to all UNIStim IP Phone clients and is one-ended. That is, it does
not require the other end of a call to support any special protocol, and it is interoperable with
any other media termination.
In this document NAT refers to both IP port address mapping and IP address mapping (also
known as NAPT). A NAT is used with or without a Virtual Private Network (VPN).
The NAT Traversal feature supports only IP clients behind cone NAT types. Three types of
cone NAT are: full cone, restricted cone, and port restricted cone. NAT traversal is not
compatible with symmetric NATs. If the IP Phone is behind a Symmetric NAT, the LTPS
582 IP Deskphones Fundamentals
on page 582,
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February 2013