IP Telephony Technology. IEEE ComSoc Meeting. Corey Coffin, SE Cisco Systems

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1 IP Telephony Technology IEEE ComSoc Meeting Corey Coffin, SE Cisco Systems 1

2 Agenda IP Convergence Call Manager Deployment Models Case Studies Summary 2

3 Toll Bypass and IP Telephony PBX PBX Router/GW IP WAN Toll Bypass Router/GW CallManager Applications CallManager Applications Router/GW IP WAN Router/GW End-to to-end IP Telephony with Applications 3

4 AVVID Solutions Customer Contact Solutions IP Telephony Solutions Security and VPN Solutions Storage Networking Solutions Network and Service Management Solutions Content Networking Solutions IP Videoconferencing Solutions 4

5 Cisco Voice and Video Solutions Clients Service Wireless SoftPhone Infrastructure Intelligent Network Services Applications Support CallManager Call Manager Servers Servers Message Servers IP Phones Video Cisco IP Fabric Telephony Apps Servers Directory Servers PCs Switches Gateways Routers Manageable Open Available Scalable Content Servers Management 5

6 That s a Long Distance Phone Call! The Cisco IP SoftPhone is used on the International Space Station to make phone calls to home. In this photo, Jim Voss is currently using the IP SoftPhone 6

7 Agenda IP Convergence Call Processing Deployment Models Case Studies Summary 7

8 IP Telephony Comparison PBX Architecture IP PBX Model Call Processing IP Phones Call Manager Line Connections TDM Switching Ethernet LAN Switch Trunk Connections Voice-Enabled Router or Gateway 8

9 Basic Phone-to-Phone Call Flow Voice Mail Server 1 Call Setup 4 Ring Back 2 Cisco CallManager E.164 Lookup IP WAN 6 Connect RTP Stream Call Setup 3 4 Ring PSTN 5 Off Hook 9

10 Agenda IP Convergence Call Manager Deployment Models Case Studies Summary 10

11 High Availability Network Infrastructure Access Layer Per-VLAN Spanning-tree UplinkFast Distribution Layer HSRP w/ load balancing OSPF/EIGP configured for fast convergence Core OSPF/EIGRP configured for fast convergence Access Layer 2 Distribution Layer 3 Core Layer 3 Server Farm 11

12 Quality of Service (QoS) Features PSTN IP WAN Campus Branch Office Campus Access Campus Distribution WAN Aggregation Branch Router Branch Switch Inline power Multiple Qs 802.1p/Q CoS DiffServ ToS Extended Trust Multiple Qs 802.1p/Q CoS DiffServ ToS Policing Congestion avoidance (WRED) 802.1p/Q CoS DiffServ ToS LLQ Traffic shaping Policing Link efficiency (LFI, crtp) WRED 802.1p/Q CoS DiffServ ToS LLQ Traffic shaping Policing Link efficiency (LFI, crtp) WRED Inline power Multiple Qs 802.1p/Q CoS DiffServ ToS Extended Trust 12

13 What is Not the Solution? 13

14 Single-Site Deployments Msg Store Msg Store LDAP Directory Cisco CallManager Cluster Cisco Unity Software IP WAN Cisco Catalyst Backbone PSTN Cisco Catalyst Wiring Closet 14

15 WAN Centralized Call Processing Cisco Unity Software Site B Centralized Cisco CallManager Cluster SRST VSM PSTN Site A IP WAN SRST Site C Cisco CallManager, voice message, and DSP resource at central site Admission control Impose limit on number of calls per site (location) No service If WAN down (unless dial backup or SRST) Telecommuter 15

16 Survivable Remote Telephony IP Phones exchange Keep alive messages and Call Processing messages with Centrally located CallManager (CCM) WAN Link fails IP phones lose contact with CCM IP Phones register with local GW as router of last resort GW queries phones for configuration and auto-configures itself GW provides call processing for duration of failure via PSTN Upon restoration of WAN, IP Phones revert back to CCM Applications Server CallManager Cluster A X WAN Headquarters WAN GW PSTN Cisco GW w/ SRST Support 16

17 Benefits of Centralized Call Processing Give remote users full enterprise level feature sets across telephony applications, instead of reduced capabilities (PBX vs. key system) Does not require IT staff at each remote site Deploy telephony to remote sites at a fraction of the time it takes for PBX or key systems Easy upgrades and maintenance As you add sites you don t add more PBXs, one Call Manager cluster supports up to 10,000 remote phones Centralized CDR reporting Small sites typically have non-redundant hardware, leading to potential long outages in case of failure 17

18 Agenda IP Convergence Call Manager Deployment Models Case Studies Summary 18

19 Large City Deployment Environment before IP Telephony Deployment over 70 sites including City Hall, Transit, Parks, Firehalls, Community Centres 2300 Centrex lines plus 44 Key Systems, PBXs, and voic platforms Cisco data network using switched 10Mbps to desk with no QoS using combination of fibre, wireless and ISDN Limited diversity on data network (single homed LAN switches) 19

20 Centrex Challenges High Operational Costs Centrex tariff increases filed Service not available in many regions/offices Lack of co-ordinated dial plan (limited 4 digit dialing not universal) Dissimilar unlinked voice mail systems Cost of moves, adds and changes Long lead times for changes Slow to deploy new features (linked to Central Office software upgrade schedule) Charges for features Single points of failure (Central Office) no D.R.P 20

21 Enterprise Wide IP Telephony City Hall Disaster Recovery ISDN Megalink PSTN ISDN Megalink Octel300 Voic E911 Emergency Responder Call Mgr Publisher Small Site (eg. Firehall, Museum, Arenas, Community Centres) Cisco 1751 SRST Router Catalyst 3524PWR-XL In-line power, QoS Analog Terminal Adapters (ATA186) Primary Call Manager (Load Balancing) 911,Backup PSTN City IP MAN (Fibre, ADSL, b wireless) PSTN 911,Backup Large Site Diverse MAN Paths To Catalyst 3524XL-PWR 1751 for 911 E911 Emergency Responder Secondary Call Manager (Load Balancing) Medium Site (eg. Mavis Works) Survivable Remote Site Telephony Cisco 3725 Router (eg. Central Library) Catalyst 354XL-PWR 21

22 Challenges Wireless phones at Transit (RF interference, hostile physical environment) Residual fax issues Pitney Bowes proprietary signaling conflicting with fax relay) Unique apps Restaurant tenants, transit recording, dial by badge Local Number Portability (LNP) challenges Oddball analog (elevator PTT, POS terminals) Small remote sites cabling, making IP phones look like key system features 22

23 Software Development Centre Converged Network Wireless Access Point Access Layer Catalyst 6509/6513 LAN Switch Distribution Cat 6509 With SFM/MSFC Voice Server Farm Cat , 6608 Catalyst 6500 Voice Gateway Card Call Manager Apps Engine, ICD Message Centre Catalyst 6500 Voice Gateway Card PSTN 23

24 Physical Security Public Space Office Space Phones and Ethernet to be physically secured Call Manager Message Center Gateway PSTN 24

25 Analog Phones Public Space Office Space Analog Telephones Call Manager Message Center Gateway PSTN 25

26 Proposed: Firewall Public Space Office Space Separate Catalyst Ethernet Switch PIX Firewall Call Manager Message Center Gateway PSTN 26

27 Separate IOS Telephony (Keyswitch) Public Space Office Space IOS Telephony Services Call Manager Message Center Gateway ISDN PRI Voice Tie PSTN 27

28 Agenda IP Convergence Call Manager Deployment Models Case Studies Summary 28

29 The Real Possibilities Government (State, Local, Federal) Hospitality Medical and Healthcare Colleges and Universities Transportation and Retail Secondary (K-12) Education 29

30 Detailed Planning is key IP Telephony Deployment Overview DATA SERVICES Network Topology Network Hardware Facilities (Power, Space) VLAN's/SubNets IP Addressing TELEPHONY SERVICES Voice Topology Dial Plan Station Equipment ( & Codec) Call Mgr Servers PSTN & Gateways TELCO ACCESS SERVICES Pilot Design Megalink & Centrex Megalink Order Details DIDs, Pilot numbers Branch PSTN (1FL, Centrex) External Voic Access SECURITY Network Call Processing Virus Protection Toll Fraud Public Area Phones Deployment & Training Bulk Admin Tool Autoprovisioning TAPS Administrator Training End User Training SYSTEMS MANAGEMENT Support Roles & Responsibilities Capacity Planning & Trend Analysis Performance Monitoring Event Monitoring Reporting IOS Levels QOS DHCP Availability & Redundancy Load Balancing Normal Operation (Traffic Flows) Failover Conditions (Traffic Flows) Branch Testing (Simulated WAN) Analog Lines Peripheral Equipment Dial Plan incl. Centrex Voice Mail Integration (Octel, Unity) Station Features Services Music on Hold, Conferencing, Time Remote Survivability Voice COS 911 CDR Reporting Personal Assistant XML applications Normal Operation (Traffic Flows & Load Balancing) Failover Conditions (Traffic Flows) Automated Route Selection Set Config's Defined/Login/Hotel Config Management Directory (LDAP) 30

31 Don t Be Afraid... 31

32

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