System information

APPENDIX H. TROUBLESHOOTING VOIP H-3
2. Take the 8-digit binary number and translate it to standard decimal. You can do so
using the Windows Calculator (Start > Programs > Accessories > Calculator). Click
View > Scientific, click Bin, enter the 8-digit binary number, and click Dec. The
number appears in standard decimal format.
3. In the Internet span’s Tuning tab, click the
Value column for the Layer 3 QoS TOS
Octet
parameter, and enter the standard decimal number.
4. Click
OK.
For more information on the Layer 3 QoS TOS Octet, refer to the following documents:
http://www.ietf.org/rfc/rfc1349.txt
http://www.ietf.org/rfc/rfc2474.txt
Troubleshooting problems with SIP or H.323__________________
This section provides information about the following:
Q Analyzing audio problems with SIP or H.323. See page H-3.
Q Troubleshooting general SIP problems. See page H-3.
Q Troubleshooting problems with SIP devices such as SIP phones and external SIP
stations. See page H-5.
Q Troubleshooting problems with SIP PSTN gateways or SIP Carriers. See page H-7.
Analyzing audio problems with SIP or H.323
Use the network capture feature on TeleVantage Server (Tools > System Settings > Network
Capture
) and check Capture server network traffic and Include VOIP audio packets.
Note:
Only enable network capture while troubleshooting as this feature can consume
TeleVantage Server resources.
To analyze the output of the Network Capture, we recommend using Ethereal which can be
obtained from
http://www.ethereal.com.
Troubleshooting general SIP problems
If you are providing telephony resources via Dialogic telephony boards, check the Windows
Server Event Log for either of the following events:
Q An IP telephony board has failed
Q An IP address conflict between an IP telephony board and another device has been
detected.
If you are using the Tftpd32 TFTP Server (included with TeleVantage) to download updates to
Aastra SIP phones’ firmware and configuration files, your Technical Support representative may ask
you to turn on Tftpd32 TFTP Server logging via the Windows registry setting TftpLogFile. To do
so, see page J-16. For more about the Tftpd32 TFTP Server, see Chapter 17.