Cadence Flash F200-2 Guia de Resolução de Problemas descarregar pdf (Página 166)

166 VoIP

isetNATShow

Syntax:

isetNATShow “IPAddr” or “TN”

The isetNATShow addresses the need for additional information about

IP Phones on a NAT device. Optionally, you can enter an IP Phone TN

or public signaling IP address as a parameter, similar to the isetShow

command.

VGMC>isetNatShow

signaling Media Public IP Addr:Port Public IP Addr:Port

(Private IP Addr:Port) (Private IP Addr:Port) NAT Type RTCP

Type Set-TN Reg-TN

---------------------- ------------------------

--------- ---- ------ ------------ ------------

47.11.217.28:5284 47.11.217.28:5289 Cone Yes i2004 61-09

61-09

(192.168.0.102:5000) (192.168.0.102:5200) 47.11.222.45

:6200 <No speech possible> Symmetric No i2004 64-03 64-09

(192.168.0.100:5000)

47.12.48.12:4398 47.12.48.12:4401 Unknown Yes i2050 65-01

65-01

(192.168.0.101:5000) (192.168.0.101:5200)

Total sets=3

The public and private IP address and ports are provided for the signaling

and media. If the private signaling port is not available, it is not printed.

The NAT type is indicated (as detected by the Port Mapping Discovery

with the second ES). The output indicates whether RTCP signaling is

supported; if “No”, then features that depend on RTCP may not work

correctly. The feature that uses RTCP is the QoS Monitoring feature,

otherwise known as Proactive Voice Quality Management (PVQM). For

RTCP feature to work, the NAT device must assign the public RTCP port

for a telephone to equal RTP+1 (that is, RTCP Public Port = RTP Public

Port +1). In many cases, the NAT device assigns public ports sequentially,

so the RTCP port is RTP+1 (for example 10002 for RTP and 10003 for

RTCP). Thus, the PVQM feature works. If the NAT device does not assign

the Public Ports sequentially, the PVQM feature cannot work.

Note: The NAT device can assign the public port number for RTCP to

be the public RTP port number +1, but then the mapping cannot be

maintained because the wrong firmware is present (alarm ITG3057) or

the device is an undetected symmetric NAT (marked as Unknown NAT).

The availability of RTCP signaling still shows as "Yes" in these cases."

Nortel Communication Server 1000

Troubleshooting Guide for Distributors

NN43001-730 02.02 31 December 2009

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