O'Reilly logo

Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Telnet

Telnet is a simple method of checking whether a specific TCP port is available from a client machine. From a machine that is having trouble contacting a server, use the following steps to verify connectivity to the Registrar service:

1. Open a command prompt.

2. Type the following command:

telnet <Director pool FQDN> 5061

If the window goes blank and only a flashing cursor is seen, it means the connection was successful and the port can be contacted without issue. If the connection fails, an error is returned. Check that the services are running on the Director and that no firewalls are blocking the traffic.

Tip

The Telnet client has not installed by default since Windows Vista and Windows Server 2008. On a desktop operating system, it ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required