IP Telephony Standardisation and Deployment

1
IP TelephonyStandardisation and Deployment
Stefan Gessler NEC Europe Ltd.,
Heidelberg stefan.gessler_at_ccrle.nec.de
Herwart Wermescher INFONOVA GmbH,
Graz herwart.wermescher_at_infonova.at
Part I Who is Who Standards, Organisations,
Profiles
Part II TTT-Services An IP-Telephony Deployment
Project
2
Part I Who is Who- Standards
?
SIP-BCP-T Q.BICC / H.323
H.323SIP
H.225.0
Sigtran
MGCPMEGACO/H.248
3
Standards Two Worlds, merging?
.
.
IPTEL - IP Telephony (TRIP, CPL, ...) SIP - Call
Setup Signalling MEGACO - Media Gateway
Control SPIRIT - IP Service access from IN
SIGTRAN - PSTN Signalling over IP PINT - PSTN
and Internet Interworking ENUM - E.164 Number
mapping MMUSIC - Internet Conferencing AVT -
Audio/Video Transport (RTP) DIFFSERV, INTSERV,
RSVP - QoS SIP-H323 BoF
SG 4 - Network Management, QoS,
Billing, Security, .. SG 2 - E.164 Numbering
Plan SG 11 - Signalling and Protocols,
Mobility, SS7, INAP, Q.
(Q.BICC) SG 12 - End2End Transmission
Performance Q 1823 QoS Voice over
IP SG 16 - packet based Multimedia Services,
H. (H.323, H.450, H.248),
Mobility, G. (G.7xx), T. ...
MEGACO H.248
IMTC / IETFSIP-H.323 IW
ETSI TIPHONH.323 SIP
4
ETSI EP TIPHON
.

• European Telecommunications Standards Institute
• TELECOMMUNICATIONS AND INTERNET PROTOCOL
  HARMONIZATION OVER NETWORKS - TIPHON
• Interworking between IP-based telephony and SCN
• 8 Workinggroups

• WG1 - Requirements, charging and security
  matters
• WG2 - Architecture models and interfaces
• WG3 - Call control matter
• WG4 - Naming and address translation issues
• WG5 - Quality of service aspects
• WG6 - Verification, demonstration and
  implementation
• WG7 - Wireless and Mobility aspects
• WG8 - TIPHON Security

5
ETSI Project TIPHON

• Ambitious workplans, very frequent meetings
• Worldwide coverage
• Contributing to ITU-T and other bodies
• Close co-operation with many related
  organisations like ITU-T, ECMA, MSF/MSAF, EP
  SPAN, EP UMTS, TC-SEC, TC-TMN, IETF, IMTC
  (aHIT!, iNOW,CoIP), EURESCOM, ISO/IEC, ECMA,
  ANSI, TTC, .
• Started with H.323, recently adopted SIP (-like)
  based systems as alternative
• Organizes frequent interoperability events
• Nucleus for further activities (EC Projects,
  TIPIA, TTT-Services, ...)

6
ETSI TIPHON Architecture

• Functional structure planes

• Architecture defines layered model

• Multi domain approach -gt plenty of interface
  referenced

7
TIPHON Architecture Mapping
H.248/MEGACO
Sketch according to P. Sijben, Lucent Tec.
8
More Standardisation IMTC
IMTC The International Multimedia
Teleconferencing Consortium mission is to
promote, encourage, and facilitate the
development and implementation of interoperable
multimedia teleconferencing solutions based on
open international standards. Various activity
groups, interesting

• IMTC AG CoIP - Conference over IP - H.323
  conferencing system interoperability
• IMTC AG iNOW! - Interoperability NOW! -
  Defining profile based on reduced H323 set to
  quickly provide IP telephony
  interoperability - Terminal Profile for
  IPClientlt-gtPhone interoperability -
  Interdomain Profile for GKlt-gtGK and GWlt-gtGW
  interoperability

• IMTC AG aHIT - Applications on Harmonized
  Interoperable IP Telephony - Interoperability
  issues between service providers in a
  multi-vendor environment - Considering
  H.323-SIP Interoperability - Definition of
  sample application scenarios

9
More Standardisation
PacketCable Initiative - Voice over Packet
within Cable TV Networks - MGCP
INF Intelligent Network Forum - Framework for
distributed network intelligence, common for
public telephony, data and enterprise networks
leveraging existing IN techn.
10
More Standardisation
SoftSwitch forum - dealing with Softswitch
technology - SIP extension SIP BCP-T for
Inter-MGC communication
ECTF Enterprise Computer Telephony Forum -
Interworking of CTI devices - TAPI
TIA Telecommunications Industry Association
- close to ANSI - TR-41 User Premises
Telecommunications Equipment Requirements
- standardize system functionality of
IP-telephony infrastructures -
Voice quality over IP, transmission performance,
wireless, - whole device
standard, based on H.323, SIP, Megaco, ...
11
More Standardisation

• Pulver.com (Jeff Pulver)
• Commercial activity
• No standardisation efforts
• Organising conferences, workshops, testings
• VON-conferences IPTel family get-together

• Interoperability Testings
• IMTC and ETSI TIPHON
• - face-to-face interop events
• - started with remote interop events
• - SuperOp (all IMTC AGs, ETSI TIPHON and TAPI)
• SIP BakeOff
• Pulver Testnetwork, Testlab, MoU

Increasing trends towards some sort of Compliance
Certifications
.
12
Part II Deployment
The challenge of deploying a multi IP-Telephony
serviceis tackled by an activity called
TTT-Services
PART II Mr. Herwart Wermescher Chairman
TTT-Services
13
Standards Two Worlds, merging?
ITU-T Telecommunication Standardisation
IETF Internet Evolution
IPTEL - IP Telephony (TRIP, CPL, ...) SIP - Call
Setup Signalling MEGACO - Media Gateway
Control SPIRIT - IP Service access from IN
SIGTRAN - PSTN Signalling over IP PINT - PSTN
and Internet Interworking ENUM - E.164 Number
mapping MMUSIC - Internet Conferencing AVT -
Audio/Video Transport (RTP) DIFFSERV, INTSERV,
RSVP - QoS SIP-H323 BoF
SG 4 - Network Management, QoS,
Billing, Security, .. SG 2 - E.164 Numbering
Plan SG 11 - Signalling and Protocols,
Mobility, SS7, INAP, Q.
(Q.BICC) SG 12 - End2End Transmission
Performance Q 1823 QoS Voice over
IP SG 16 - packet based Multimedia Services,
H. (H.323, H.450, H.248),
Mobility, G. (G.7xx), T. ...
IMTC / IETFSIP-H.323 IW
ETSI TIPHONH.323 SIP
MEGACO H.248