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Connecting to Remote Networks © 2004 Cisco Systems, Inc. All rights reserved. Using Circuit Switching in WANs INTRO v2.0—7-1
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-2 Outline Overview Circuit-Switched Communication Links Public Switched Telephone Network Integrated Digital Services Network Summary
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-3 Circuit Switching
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-4 PSTN
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-5 PSTN Considerations Advantages Simplicity Availability Cost Disadvantages Low data rates Relatively long connection setup time
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-6 ISDN
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-7 BRI and PRI
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-8 ISDN Considerations Advantages Speed Always-on availability Disadvantages Limited geographic availability Cost
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-9 Summary With circuit-switched WAN communication links, a dedicated physical circuit is established, maintained, and terminated through a carrier network for each communication session. The most common type of circuit-switched WAN communications is PSTN (also referred to as POTS). The physical characteristics of the local loop and its connection to the PSTN limit the rate of the signal over the PSTN. The upper limit is around 33 kbps. The rate can be increased to around 56 kbps if the signal is coming directly through a digital connection. ISDN refers to a set of communication protocols proposed by telephone companies to permit telephone networks to carry data, voice, graphics, music, and video. ISDN was developed to permit faster access over existing telephone systems without the additional call setup time.
© 2004 Cisco Systems, Inc. All rights reserved. INTRO v2.0—7-10 Summary (Cont.) ISDN offers two types of services: BRI and PRI. The ISDN BRI service, intended for the home and small business users, provides two B channels (128 Kbps) and one D channel (16 Kbps). The BRI B channels carry user data, while the BRI D channel usually carries control and signaling information. The ISDN PRI service, intended for larger installations, delivers 23 B channels and one D channel in North America for a total bit rate of up to 1.544 Mbps (T1).
There are many types of WAN technologies that can be used to solve the problems of users who need network access from remote locations. We will go through.
WAN Technologies WAN TECHNOLOGIES. Technology Options Dial-up Leased Line ISDN X.25 Frame Relay ATM DSL Cable Modem Microwave Point-to-Point Link VSAT.
Presented by: Eng. Karam Al-sofy
Communication Systems (2) CT 1401
Networking at Home the Office and Globe
CHAPTER Digital Lines and the Integrated Service Digital Network (ISDN)
Thought For The Week No Question Is A Bad Question!
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CP Networking1 WAN and Internet Access. CP Networking2 Introduction What is Wide Area Networking? What is Wide Area Networking? How Internet.
Connecting to Remote Networks © 2004 Cisco Systems, Inc. All rights reserved. Using Packet Switching in WANs INTRO v2.0—7-1.
© 2006 Cisco Systems, Inc. All rights reserved. ICND v2.3—7-1 Completing ISDN Calls Configuring ISDN BRI and PRI.
WAN Technologies Dial-up modem connections Cheap Slow
© N. Ganesan, Ph.D. Digital Lines and the Integrated Service Digital Network (ISDN) © Nanda Ganesan, Ph.D.
Telecommunications systems (Part 1) School of Business Eastern Illinois University © Abdou Illia, Spring 2007 (Week 12, Tuesday 3/27/2007)
Copyright Methods available There are a number of ways of connecting to the internet. These include: - ‘Dial-up’ - Integrated Subscriber.
CNDS ISDN Presentation Group Members: 1.Kok Wai Hien KL Oon Thiam TeckKL Lim Cheah YiingKL Woon Yen LinKL Tan Pei VoonKL
1 Chapter 12 Remote Network Access Using Remote Connections SLIP and PPP WAN Technologies.
Circuit Switching Blocking occurs when the network is unable to connect to stations because all possible paths between them are already in use. Non-blocking.
ISDN RAHUL BHALLA. What is ISDN? ISDN (Integrated Services Digital Network ) is comprised of digital telephony and data-transport services offered by.
Types of Communication Links Modem dial-up Leased Line ISDN Broadband –ADSL –cable broadband –Ethernet broadband.
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