1. VoIP Signaling and Call Control
Cisco Networking Academy Program

2. Need for Signaling and Call Control
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.

3. Model for VoIP Signaling and Call Control
VoIP signaling components
Endpoints
Common control
Common control components
Call administration
Accounting

4. Call Control Models H.323 SIP MGCP H.248/Megaco protocol SAP RTSP
Cisco CallManager

5. Translation Between Signaling and Call Control

6. RTP Sessions

7. Call Feature Negotiation

8. Call Administration and Accounting
Monitors 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 Management
Endpoint (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 Strategies
H.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 Standards
MGCP 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 Roles
Trunk 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 signals
Packages 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 CallManager
Basic 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 Gateway
ccm-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 9
Unrecognized 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