1 VoIP Signaling and Call ControlCisco Networking Academy Program
2 Need for Signaling and Call ControlThanks for joining us today to attend the Cisco Brand and Corporate Identity Workshop. In the first half of the workshop I am going to cover Brand Matters and talk in detail about the Cisco brand, and in the second half my colleague Gary McCavvit is going to take you through our updated visual identity system. At the end of the workshop we’re going to leave some time for a fun quiz as well as some Q&A.
3 Model for VoIP Signaling and Call ControlVoIP signaling components Endpoints Common control Common control components Call administration Accounting
4 Call Control Models H.323 SIP MGCP H.248/Megaco protocol SAP RTSPCisco CallManager
5 Translation Between Signaling and Call Control
6 RTP Sessions
7 Call Feature Negotiation
8 Call Administration and AccountingMonitors call activity Monitors resource utilization Supports user service requests Accounting Maintains call detail records
9 Call Status
10 Address Registration
11 Address Resolution
12 Admission Control
13 Centralized Call Control
14 Distributed Call Control
15 Centralized Call Control vs. Distributed Call Control
16 Configuring H.323 Thanks for joining us today to attend the Cisco Brand and Corporate Identity Workshop. In the first half of the workshop I am going to cover Brand Matters and talk in detail about the Cisco brand, and in the second half my colleague Gary McCavvit is going to take you through our updated visual identity system. At the end of the workshop we’re going to leave some time for a fun quiz as well as some Q&A.
17 H.323 and Associated Recommendations
18 H.323 Adapted to IP
19 H.323 Terminals
20 H.323 Gateways
21 IP-to-IP Gateways
22 H.323 Gatekeepers
23 Multipoint Conference Components
24 Component Relationships for Call Establishment and ManagementEndpoint (gateway) to endpoint (gateway) Endpoint (gateway) to gatekeeper Gatekeeper to gatekeeper
25 RAS Messages
26 H.323 Basic Call Setup
27 H.323 “Fast Connect” Call Setup
28 Finding and Registering with a Gatekeeper
29 Call Flow with a Gatekeeper
30 Gatekeeper-Routed Call Signaling
31 Multipoint Conferences
32 Scalability with Multiple Gatekeepers
33 Call Flow with Multiple Gatekeepers
34 Survivability StrategiesH.323 replication strategies include the following: HSRP Gateway preconfigured for two gatekeepers or for multicast discovery Multiple gatekeepers configured for the same prefix Multiple gateways configured for the same prefix
35 H.323 Proxy Server
36 Cisco Implementation of H.323
37 Configuration Example
38 Configuring the Gateways
39 Configuring the Gateways (Cont.)
40 Configuring the Gatekeepers
41 Configuring the Gatekeepers (Cont.)
42 Example: show Command
43 Configuring MGCP Thanks for joining us today to attend the Cisco Brand and Corporate Identity Workshop. In the first half of the workshop I am going to cover Brand Matters and talk in detail about the Cisco brand, and in the second half my colleague Gary McCavvit is going to take you through our updated visual identity system. At the end of the workshop we’re going to leave some time for a fun quiz as well as some Q&A.
44 MGCP and Associated StandardsMGCP is defined in RFC 2705, October 1999 MGCP architecture and requirements are defined in RFC 2805, April 2000 Centralized device control with simple endpoints for basic and enhanced telephony services Allows remote control of various devices Stimulus protocol Endpoints and gateways cannot function alone Uses IETF SDP Addressing by E.164 telephone number
45 MGCP Components
46 Endpoints Eight types of endpoints are defined in RFC 2705:Digital channel Analog line Announcement server access point IVR access point Conference bridge access point Packet relay Wiretap access point ATM trunk side interface
47 Endpoint Identifiers
48 Gateways and Their RolesTrunk gateway SS7 ISUP Trunk gateway MF NAS Combined NAS/VoIP gateway Access gateway Residential gateway Announcement servers
49 Call Agents
50 Basic MGCP Concepts Calls and connections Events and signalsPackages and digit maps
51 Calls and Connections
52 Multipoint Calls
53 Events and Signals Events:Continuity detection (as a result of a continuity test) Continuity tone DTMF digits Fax tones Hookflash Modem tones Off-hook transition On-hook transition
54 Events and Signals (Cont.)Answer tone Busy tone Call waiting tone Confirm tone Continuity test Continuity tone Dial tone Distinctive ringing (0…7) DTMF tones Intercept tone Network congestion tone Off-hook warning tone Preemption tone Ringback tone Ringing
55 Packages Basic packages (generic media, DTMF, MF, trunk, line, handset, RTP, NAS, announcement server, script) CAS packages (RFC 3064) Business telephone packages (RFC 3149)
56 Gateways and Their Packages
57 Digit Maps
58 Control Commands EndpointConfiguration (EPCF)NotificationRequest (RQNT) Notify (NTFY) CreateConnection (CRCX) ModifyConnection (MDCX) DeleteConnection (DLCX) AuditEndPoint (AUEP) AuditConnection (AUCX) RestartInProgress (RSIP)
59 Call Flows
60 Survivability Strategies
61 Cisco Implementation of MGCP
62 Understanding Basics of Cisco CallManagerBasic CallManager Configuration for MGCP Gateway Support: Create an MGCP Gateway Configure the FX Ports Test the Phones for Local Connectivity
63 Cisco CallManager Implementation and Call Flows—Registration
64 Cisco Call Manager Implementation and Call Flows—FXS Call Flow
65 Configuring an MGCP Residential Gatewayccm-manager mgcp ! mgcp mgcp call-agent voice-port 1/0/0 voice-port 1/0/1 dial-peer voice 1 pots application MGCPAPP port 1/0/0 dial-peer voice 2 pots port 1/0/1
66 Configuring an MGCP Trunk Gateway! ccm-manager-mgcp mgcp 4000 mgcp call-agent controller T1 1/0 framing esf clock source internal ds0-group 1 timeslots 1-24 type none service mgcp controller T1 1/1 voice-port 1/0:1 voice-port 1/1:1
67 Example: show Command Router# show mgcp statistics UDP pkts rx 8, tx 9Unrecognized rx pkts 0, MGCP message parsing errors 0 Duplicate MGCP ack tx 0, Invalid versions count 0 CreateConn rx 4, successful 0, failed 0 DeleteConn rx 2, successful 2, failed 0 ModifyConn rx 4, successful 4, failed 0 DeleteConn tx 0, successful 0, failed 0 NotifyRequest rx 0, successful 4, failed 0 AuditConnection rx 0, successful 0, failed 0 AuditEndpoint rx 0, successful 0, failed 0 RestartInProgress tx 1, successful 1, failed 0 Notify tx 0, successful 0, failed 0 ACK tx 8, NACK tx 0 ACK rx 0, NACK rx 0 IP address based Call Agents statistics: IP address , Total msg rx 8, successful 8, failed 0
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