The Nortel Signaling Server CLI discovery probes use the Telnet protocol to access Nortel Signaling Servers and Nortel Call Servers. A set of Nortel CLI commands are executed to gather Nortel CS1000 component and connectivity information. This information helps to instantiate Nortel topology objects and to establish proper relationships between them.

CLI discovery probes require Signaling Server login credentials. These credentials are configured using the Nortel Signaling Server Access setting for the Nortel Servers group. This setting is accessible through the Device Access Tab of a Polling and Thresholds Console attached to the VoIP Availability Manager. Every Signaling Server in the managed environment becomes a member of this group. The procedure to specify login credentials and to modify groups is provided in the VMware Smart Assurance VoIP Availability Manager Configuration Guide.

When Signaling Server discovery starts, a CLI discovery probe retrieves the login credentials, establishes a Telnet connection to the Signaling Server using the credentials, collects information from the Signaling Server, and executes a cslogin command to connect to the Call Server to gather information about the Call Server and its components.

By applying this method of discovery to the primary Signaling Server in the Nortel Servers group, VoIP Availability Manager is able to perform a discovery of every Nortel CS1000 and its components in the managed environment.

If a probe of a primary Signaling Server is successful, VoIP Availability Manager creates an object for each discovered VoIP service. Examples of discovered VoIP services are MediaServices, SignalingServices, and GatewayServices.

If the probe is not successful, VoIP Availability Manager places the name of the probe (the name includes the name of the device that the probe is probing) on its Pending Elements list. Chapter 4, “Understanding Discovery Results,” provides information about discovery errors and the Pending Elements list.