Cisco CallManager supports the following capabilities for remote serviceability:
Cisco Secure Telnet?Allows CSEs to log on to customer remote site to troubleshoot Cisco CallManager system.
Show Command Line Interface?Allows CSEs to display Cisco CallManager system statistics on customer network.
Microsoft Windows 2000 Performance Monitoring?Allows administrators to monitor performance of Cisco CallManager on local or remote installations.
Message Translator for ISDN Trace?Allows CSEs to use Q931 Message Translator to debug ISDN Layer 3 protocol messages.
CiscoWorks2000 Network Management System?Provides remote network management for a Cisco CallManager cluster.
Path Analysis Interface?Traces connectivity between two specified points on a network and analyzes both physical and logical paths (Layer 2 and Layer 3) taken by packets flowing between those points.
System Log Management?Provides a centralized system logging service for Cisco IP Telephony Solutions.
SNMP Instrumentation?Enables administrators to remotely manage network performance, find and solve network problems, and plan for network growth.
Try:
http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_administration_guide_book09186a00800c2f5b.html