SBC 1000/2000 4.1.x : Common Troubleshooting Issues

Initial Configuration

I set the network configuration in the initial configuration page, but I still cannot see Sonus SBC 1000/2000 on the network.

  • Check the Ethernet port's speed and duplexity and match that to the Ethernet port configuration in Sonus SBC 1000/2000.

After Initial Configuration, I am importing an old backup from a different Sonus SBC 1000/2000, but my T1/E1 ports do not match the configuration.

  • Try inserting the card into the other slot. Also, you will have to reset the configuration to factory defaults in order to remove the auto populated ports and restore the old configuration again.

ISDN related issues

ISDN port stuck in Yellow alarm state

MOC conference participants get static when PSTN caller joins the conference

SIP related issues

Tenor signaling group in Sonus SBC 1000/2000 will be up and then will go down for no apparent reason


Where can I find a guide to configure a fax solution for Lync?

Using a Tenor as an Analog Device in a Lync Sonus SBC 1000/2000 SBA Deployment

When do I use G.711 VS T.38?

It is recommended to use G.711 when implementing a fax solution where Sonus SBC 1000/2000 and the fax server are on the same LAN. T.38 should be used when there are many hops.

The faxes have quality issues.

Check clock source setting.

Faxes from PSTN via Sonus SBC 1000/2000 to FACSys fax server do not complete

Audio Quality

Call Completion issues

Call rejected from PSTN with ISUP cause code 16, Sonus SBC 1000/2000 sends 500 Internal Server Error to Lync

Forked PSTN call to Lync and PBX gets disconnected by Sonus SBC 1000/2000 upon receiving STATUS message from PSTN

Call Presentation

Calling Name for PSTN to Lync calls is not displayed correctly

Calling Name is not present on outbound calls over ISDN port with NI2 or Euro-ISDN switch variants

Certificate Related

Common Troubleshooting Issues with Certificates in Sonus SBC 1000-2000

Lync Deployment

Config Replication step in the Setup SBA task fails with "A network-related or instance-specific error occurred while establishing a connection to SQL Server"

The Config Replication Step of Setup SBA Task Fails with Failed to run configuration replication script

Lync Operational

Calls to PSTN numbers fail. Lync declares the gateway unavailable with Event ID 46046

Lync clients at Branch Site cannot establish MTLS connection with the Central Pool

Lync Server 2010 Archiving Agent fails to create local queue on the SBA

Monitor application does not load. Monitor displays - Failed to connect to the Server. Please try again.

When querying Active Directory cache, attributes are missing in the search result

Workaround for no ring back in PSTN to Lync calls