 oft  P. Verbeeck/L. Schatteman - March 2000 All rights reserved © 2000, Alcatel, Antwerp. Selim SARPER - Program Director & ARGE Müdürü

 oft  P. Verbeeck/L. Schatteman - March 2000 All rights reserved © 2000, Alcatel, Antwerp. Alcatel 1000 Call Server P. Verbeeck - Program Director Call Server & Gateways Last updated: March 27th 2000

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 3 Topics.  Product Positioning.  How does the network evolve?  What is a call server?  Where does it fit in the network?  Some applications.

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 4 Why does the Network topology change? (1)  Data (r)evolution:  Data Traffic volume is rapidly overtaking Voice Traffic volume.  But: Voice still accounts for up to 80% of Operator Revenues.  Changes in regulatory environment:  Competition forces operators to review the cost of their operations.  Unbundling of the network / bundling of services allows new entrants to propose customers interesting deals.

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 5 Why does the Network topology change? (2)  Dial-Up Internet traffic (over-)loading the TDM network  Different access equipment for different service  POTS/ISDN, Leased Line, Frame Relay, ADSL  The need for more bandwidth  Technology evolution.  Codecs, processing capacity, …  And above all:

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 6 Why switch to the New Network?  There can be only one reason: your bottom-line.  New Revenues: Offering bundled services between voice- and data. Offering new services to create a synergy between both domains. Enhance existing voice-services with Web-capabilities. (e.g.: profile modifications.  Reduce Costs: One single network to manage for voice and data. Reduced engineering cost due to self-routing capabilities of packet-based networks.

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 7 Network of today Data ATM, IP BB NAS Transit TDM Local SMC DSLAM NAS = Network access server SMC = Service Management Center DSLAM = Digital Subscriber Line Access Multiplexer LEX TEX Litespan RSU

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 8 Network of Today Issues  Reduction of OPEX  Gap between 2Mbit/s, as switching termination, and SDH at transmission side  Dial-Up Internet traffic (over-)loading the TDM network  Exponential growth in the data traffic  Different access equipment for different service  POTS/ISDN, Leased Line, Frame Relay, ADSL  The need for more bandwidth

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 9 Future network Data ATM, IP Transit TDM Local P.F. SMC DSLAM BB NAS P.F. TGW = Trunking Gateway CS = Call Server TGW CS TGW

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 10 5 Network Independent Services Legacy Network Signaling/Service Legacy Network Media Call Server Gateway Network Architecture of future 4 functional layers

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 11 ? ?IP address for E.164? GateKeeper Call Server Controlling Voice over Data Call server functions : Control of access/trunking and ‘residential’ gateways Toll/Tandem (Class 4) and Local Exchange (Class 5) bypass Megacop and other control protocols (MGCP, Sigtran, H.323, …) VToA and VoIP, in future also TDM and mobile Distributes call control functionality into regional platform Deployment of PoPs (Point of Presence) in new service areas

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 12 The next generation “Virtual Switch” Call Server Control Transport/Media OSSService layers Data Servers Application Servers  oft 

All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 13 The next generation “Virtual Switch” Call Server Control Transport/Media OSSService layers PSTN LEX/TEX WGW TGW RGW AGW Data Servers Application Servers  oft 

All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 14 Call Server : network view in data network domain DNS Server Web Server Bank Server A1000 Call Server IP Terminal (SIP/H323/MGCP) E_Mail Server Multi Media Peripherals Application Servers LEX NAS WGW IP/ATM NETWORK Media Gateway  oft 

All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 15 Wireless PSTN Cable TV GW FR RAN ATMLAN Proxy GW BBRAN GW Convergent Networks Core LMDS  oft 

All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 16 The Role in the NGN  A call server is the ‘intelligence’ in a distributed switch/router network, using gateways (Trunk-, Access-, Residential-, Wireless-GW) to convert the bearer traffic from their native transport mode to the mode used in the data-network (mainly IP)  Other names, used in the industry: SoftSwitch, Call Agent  A Call Server deals mainly with real-time services: voice, video, multimedia  It does not interfere with services that require no network support

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 17 H.321 B-ISDN H.323 or MEGACOP Media (RTP) Media (RTP) Q.931 Media (RTP) Q.931 H.320 N-ISDN IP Gateway PBX ISUP/SS7 TCAP ISDN - BRI IP Gateway Media(RTP) MEGACOP IP Gateway Media(RTP) MEGACOP Analog Telephone Mobile Telephone Media (RTP) H.323 Terminal Media (RTP) H.323 Terminal Mobile Telephone Analog Telephone PBX ISUP/SS7 SCP TCAP LNP/WNP Enh 800 SS7 Network STP PSTN Wireless/Wireline PSTN Wireless/Wireline INAP, TCAP, LDAP, RADIUS TCAP INAP SCP LDAPRadius Enh 800Directory IN Services IP Internet/ Intranet ISUP/SS7 TCAP/SS7 H.323 MEGACOP SS7GW Call Server MGC Call Agent H.323 Gatekeeper Integrated IP/PSTN network topology. IP Internet/ Intranet

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 18 6 ATM / IP Network N7 Network STP Local Exchange Local Exchange SS7 GW Call Server MGC Call Agent STP Local Exchange STP ISUP/N7 Call Control Protocol MGCP Control & Voice VToA / VoIP Trunk Gateway SS7 GW VToA / VoIP Trunk Gateway VToA / VoIP Trunk Gateway STP network overlay Signaling without STP overlay Application: Toll Exchange Replacement

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 19 7 IP / ATM network Call Control Protocol MGCP Control & Voice Trunk Gateway Local Exchange Network Call Server Local Exchange Network Trunk Gateway Control & Voice Application: Long Distance Network

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 20 9 ISDNPOTS ISDNPOTSxDSL ATM / IP Network Call Server Control, Voice and Data VToA / VoIP Access Gateway VToA / VoIP Access Gateway VToA / VoIP Access Gateway IAD xDSL ISDNPOTSxDSL Application: Local Exchange (Class 5) Replacement

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 21 ISDNPOTSxDSL 9 ISDNPOTS ATM / IP Network Call Server Control, Voice and Data VToA / VoIP Access Gateway VToA / VoIP Access Gateway IAD xDSL ISDNPOTSxDSL Application: General case (simplified) VToA / VoIP Trunk Gateway Local Exchange N7 Network STP

 oft  All rights reserved © 2000, AlcatelPVb-WZ-JM/LSch - Antwerp/Plano, March 2000, page 22 Call Server Control Transport/Media OSSService layers TGW AGW RGW... LEX/TEX AGW UMTS The next generation “Virtual Switch” Data Servers Application Servers