Initial Configuration

Network Components

  • NTP, used for synchronising clocks. A stratum level 1 timing source device is extremely precise using the rare earth element cesium. Cesium rocks are very expensive. GPS Satellites provide stratum level 1 clocking source that provides cost-effective synchronisation
    • Stratum 1 are distributed over networks to provide timing for large number of devices
    • Stratum 2 uses rare earth element rubidium. Distribution of Stratum 2 becomes incorrect more quicker than Stratum 1 information. Accurate enough for SONET but quickly looses inaccuracy when distributed.
    • Stratum 3 based on rare earth element quartz, affordable enough for watches. Accurate enough for SONET but quickly looses inaccuracy when distributed.
    • Only CUCM Publisher will use NTP to obtain time information
  • Dynamic Host Configuration Protocol
    • Allows endpoints to obtain IP addresses automatically
      • Important settings: IP Address, s/m, d/g, option 150, dns
  • Trivial File Transport Protocol
    • Used by IP Phones to obtain configuration files and their software  (binary image load). TFTP Service used on atleast one CUCM
  • Domain Name System
    • Protocols that allow IP Applications to refer to other systems by logical names rather than IP addresses. CUCM can be configured to use both


  • NTP Assigned to time and Date Group
    • CDR provide time-stamped call reporting, analysis and billing information. Call Management Records (CMR) contain QoS information regarding quality of phone calls, lost packets,, average jitter (delay variation) and maximum jitter. CMR’s are mapped to CDR
    • Alarms, logs and trace files include time stamps with millisecond-level accuracy. One second processing can have hundereds of lines of trace outputs. Troubleshooting requires correlation of these files available in different systems
    • Time-of-Day Routing
  • DHCP: on CUCM for a max of 1000 phones
    • No backup config is possible
    • Configure DHCP Relay by ip helper-address
      • Activate DHCP Monitor Service
      • Add and configure DHCP Server
      • Configure DHCP Subnets


    • Eliminating the requirement of a DNS reduces the danger of DNS Configuration errors DNS outage, and latency
IP Address Advantages DNS Advantages
Does not require DNS Simplifies management because names are used
Prevents IPT nw from failing if DNS Server is down Easier IP address changes because of name based paths
Decreases time to contact CUCM Server Allows server to IP phone NAT
Simplifies troubleshooting
  • Configuration
    • System > Server
    • Change name to IP address

Network and Feature Services
Network Services
Network services; are automatically activated and required for operation of server Control Centre > Network Services
Relies on following:

  • Performance and monitoring services: CM Serviceability RTMT, and RTMT reporter
  • Backup and Restore: DRF Master, DRF Local System Service, CallManager Serviceability, Cisco CDP, Trace Collection Service
  • Platform Services: Cisco Database, Cisco Tomcat, SNMP Master Agent
  • DB Services: Database Layer Monitor
  • SOAP Services: SOAP realtime service APIs and so on
  • CM Services: Cisco CDR Repository Manager, CDR Agent
  • Admin Services, CCM Admin

Feature Services

Feature Services: selectively activated or deactivated.

    • Tools > Service Activation
    • Control Centre > Feature Services

Summarised as follows:

  • Database and Admin Services: Cisco AXL web Service, Bulk Provisioning Service, Cisco TAPS Service
  • Performance and Monitoring Services: Serviceability reporter,SNMO Service
  • CM Services: CCM, TFTP, CTI Manager, Extension Mobility
  • CTI Services: Attendant Console, IPMA, Webdialer web service
  • CDR Services: Cisco SOAP, including CDRonDemand Service, CAR scheduler, Cisco CAR Web service
  • Security Service: CTL Provider, Cisco Certificate proxy function
  • Directory Services: Cisco DirSync
  • Voice Quality Reporter Services: Cisco Extended functions


1)      Tools > Service Activation
2)      Select Server
3)      Check/uncheck service and save to modify changes
4)      Control Centre to see service statu
Tools > Control Centre > Feature Services

Global Server Settings

Two Types: Enterprise Parameters and Service Parameters

Enterprise Parameters

Used to define Cluster wide system settings

Parameter Description Default Value
Auto Registration phone Protocol Protol that auto-registered phones should boot from SCCP
Enable dependency Records Determines whether to display dependency Records False
CCMUser Parameter Display of hide certain user configurable setting s from CCMUser webpage N/A
Phone URL Parameter URL’s for phone Authentication, Directory button, Services etc Hostnames rather than IP addresses
User Search Limit Specifies max number of users to be retrieved from a search in a Corporate Directory Feature 64

Service Parameters

Used to define settings for a Specific service (eg call processing for call manager) The most important CUCM features are:

  • T302 Timer, interdigit timer, default is 15,000 ms (15 seconds)
  • CDR & CMR, cdrs are the basis for call reporting, accounting and billing. CMR’s enable QoS information related to the phone call.
  • Cisco Unified Mobility maximum login time: After expiration users are logged out of extension mobility u
  • Cisco Unified Attendant Console Username: specifies the application username that is used by Cisco Unified Attendant Console application when logging into CUCM Computer Telephony Integration (CTI) interface

Use Advanced button to see complete list


Parameter Description Default Value
CDR Enabled Flag Whether CDR’s are enabled False
Station Keepalive interval Interval between keepalives from Phones to primary CCUM 30 Secs
T302 Timer INterdigit Timer 30 Secs
AAR Enable Use AAR if system does not have enough Bandwidth False
Change B-Channel Maintenance Check Individual B channel maintenance status for PRI and CAS interfaces in real time for troubleshooting No Default

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