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

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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 Director, use the following steps to verify connectivity to the Registrar service:

Tip

The Telnet client is not installed by default in modern Windows operating systems. On a desktop operating system it must be installed by using the Turn Windows Features On or Off option found in Programs and Features. On a server operating system it can be installed through the Features section of Server Manager.

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, the connection was successful and the ...

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