CCNA Collaboration – Notes, Chapter 2

CICD – Ch2 – Unified Collaboration

Unified Collaboration

  • More than just VOIP
  • Bring all collaboration into a seamless framework
    • Includes: voice, video and data
  • CICD covers core solutions
    • CME – Communications Manager Express
    • CUCM – Cisco Unified Communications Manager
    • CUC – Cisco Unity Connection
    • CUIMP – Cisco Unified IM and presences
  • There are more outside of this exam
    • Contact Center
    • WebEx
    • Telepresence
    • Spark

Communications Manager Express

  • Runs IP telephony on an ISR (integrated services router)
  • ISR can terminate analog and digital circuits
    • FXO, FXS, T1
      • FXO – Office, connects to POTS circuits
      • FXS – Station, connects to endpoints, analog phones, fax, modem
    • Supports VOIP endpoints
    • Features: conference calls, video, automatic call distribution
  • Platform dependent on number of supported phones
    • ISR4451, can handle 450 phones
  • All in one device for controlling phones and trunking to PSTN

CME Features

  • Call processing and device control
  • CLI or GUI based configuration
  • Local directory service
  • Computer Telephony Integration (CTI)
    • Control a device remotely. Example, have jabber make calls using your desk phone
  • Trunk to other voice systems
  • Integration with Unity Express
    • Runs on modules installed in router
    • Provides voicemail features

CME and IP Phones

  • CME controls virtually every action performed on phone
  • SCCP (skinny) or SIP used for signaling protocols to allow CME to communicate and control the phone
  • CME instructs phones where to connect, establish calls
    • Not involved in the RTP stream of traffic
    • CME is not required after a call has been setup
    • Exception: If call is going to PSTN that is attached to the CME router


  • Linux based, VMware guest
  • Provides core device control, call routing, permissions, features, connectivity to outside applications
  • GUI based administration

CUCM Key Features

  • Full audio and video support
  • Appliance based operation
  • VMware install, on supported hardware
  • Redundant server cluster
    • Single CUCM cluster can handle 40000 phones running SIP or SCCP
    • Megacluster can handle 80000 phones
  • Intercluster trunk and Voice Gateway control
  • Built in disaster recovery
    • Done through sFTP
  • Directory service support and integration
    • Built-in or LDAP
  • Database replication
    • Publisher replicates read-only database to subscribers in the cluster
  • Run Time Data
    • Intercluster communication signaling (ICCS)
    • All servers in cluster form TCP connectionn for ICCS over TCP ports 8002-8004
    • Assuming 10,000 busy hour calls = 1.5Mbps per server
  • Changes to database are performed on Publisher
  • Standard cluster supports single publisher and 19 subscribers
    • 8 for call processing
  • 11 other subscribers can be TFTP, conference bridge, MOH, annunciater
  • TFTP is critical for phone and gateway operations
    • Bulk of config is downloaded from TFTP
  • Best practice is to pull publisher out of all call processing and let subscribers do the work
  • Phones can list 3 redundant CUCM servers for failover purposes

Unity Connection

  • Make any message retrievable from any voice enabled device or application
  • Supports 20000 voicemail boxes
  • Runs as VMware guest
  • Active / Active setup, publisher, subscriber
  • Features
    • Personal call transfer rules, speech recognition

Unity Connection Key Features

  • Appliance based
  • 20k mailboxes per server (cluster?)
  • Access voicemail from anywhere
  • LDAP integration
  • Microsoft Exchange support
  • Voicemail Profile for Internet Mail (VPIM)
    • Integration of voicemail services from difference vendors
  • Active / active high availability
    • Publisher / subscriber cluster
    • Both accept client requests
  • CUCM + CUC communicate using SCCP or SIP

IM and Presence – IMP

  • Jabber client
  • Shows full presence status
  • Enterprise instant messaging
    • Jabber, Extensible Communication Platform (XCP)
    • Industry standard, works with different IM clients
  • Message compliance
    • Logging
    • Encryption with TLS
  • Interdomain federation
    • Connects to other domains outside of your business
    • Business to business communication
  • Secure Messaging
    • TLS, IPSec
  • Jabber XCP extensibility
    • File sharing, app sharing, video conferencing
  • IMP integrated with CUCM supports 45000 users
  • IMP, IM only – 75000 users
    • No integration with CUCM


  • IM Client: peer to peer client, multiuser chat, persistent chat
  • LDAP integration
  • Integrated with CUCM, able to see On/Off hook status
  • Start voice and video calls (HD)
  • Soft phone
  • CTI support, control desk phone from jabber client

Video Communication Server (VCS) + Telepresence Management Suite (TMS)

  • Call types
    • Internal desktop calls
      • Between 2 endpoints with camera
      • Registered to CUCM
    • Telepresence Calls
      • Using TP endpoints
    • External Video Calls
      • Business to business

VCS Control

  • Self contained video endpoint call control system for customers without CUCM

VCS Expressway

  • 2 servers – communicate as a trusted relationship
    • Core – inside firewall
    • Edge – deployed in DMZ
    • Perform firewall traversal
    • Allows callers to signal CUCM to setup video call with endpoints registered to CUCM

TMS – TP Management Suite

  • Manages scheduling of TP Meetings
  • For administrators
    • Provisioning tool to deploy TP endpoints across multiple locations within organization
    • Central admin of all TP infrastructure resources
    • Real time management of all conferences
    • Phone book sync
    • Reporting
  • For users
    • Ease of scheduling
      • Outlook / exchange integration
      • one button to push
    • Contact – phone book from multiple sources

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