Transcript
Broadband and Wide Area Network Services Carrier Gigabit Ethernet Multi Protocol Label Switching Vs. IP VPNs T-1 & T-3 SIP Trunks Security Network Topology Backup Services Managed Services
Carrier Network Services Remote worker
Branch office
Branch office
Internet
Your home
PSTN (Public switched telephone network)
Headquarters
Connections to Carriers’ Networks Legacy TDM Voice network
Carrier DACS
Customer Premise
! " #$%&' Switch
Internet TDM Voice PBX
Connections to Carriers’ Networks VoIP to customer network Customer Premise Carrier IP Voice/Data network ! " #$%&' Switch
Customer IP PBX
Carrier Gigabit Ethernet Site to site links in metro areas Internet access Flexibility Speeds Scalable capacity
Fiber Same protocol as LANs Over copper Slower speeds Not available everywhere
Not suitable for traditional voice
Overview of an MPLS Network High-speed core routers
MPLS Network
Edge routers attach labels to customers’ packets
• Edge routers connected directly to customers • core routers connected only to other routers
Access Lines provide service connections (TDM =T1, T3, SONET; IP = DSL, Ethernet) and the
Can be on same circuit to carrier’s network
Internet
Access lines
Customer premises
router LAN switch
VoIP phone
IP VPNs – Using the Public Internet • Sending traffic over the public Internet – Encrypted
• • • •
Cost savings Site to site Telecommuters Remote salespeople
Secure Remote Access to MPLS or IP VPNs
Secure tunnel over broadband, Internet, & MPLS
Internet
Secure tunnel over high-speed access line MPLS NETWORK
Telecommuter
Headquarters' LAN Telecommuter’s laptop and headquarters have matching security tunneling protocols surrounding data.
T-1/T-3 Time Division Multiplexing What are the pros and cons of T-1/T-3 service?
Each device assigned a time slot
1
24 or 32 channels
T-1 Mux
2
3
4……..24
24 or 32channels
T-1 Mux T-1 - Fiber, copper or wireless, 24 channels E-1 - Fiber, copper or wireless, 32channels T-3 – Fiber or wireless; 672 channels E-3 – Fiber or wireless: 480 channels
Session Initiation Protocol (SIP) Trunking • A standardized signaling protocol in IP networks – Used to connect carriers to each other – Connects enterprise VoIP PBXs to carrier’s circuits
• Used on the Internet • In VoIP PBXs – Trunks connected to the Internet – Combine VoIP and data
• Different implementations by PBX manufacturers and carriers
How do we Choose Carrier Services? •
Each group should explain the service assigned to their group by answering the questions below. – T-1 - Group 1 – T3 – Group 2 – Carrier Gigabit Ethernet – Groups 3 and 4
• •
Let us know the size of organization that would use it (small, medium, large) For your service let us know: – – – – – – –
Its speed Multiplexers or switch needed to support it Ability to increase capacity (scale) Ability to shrink capacity if the company decreases in size Does it support voice, data, and video? Media it operates on Disadvantages of this service
Hub and Spoke Topology
Gigabit Ethernet Seattle
Internet Los Angeles
Wide area network Centralized applications at headquarters T-1 at smaller sites
Houston
Miami
Outside Cable Reliability
• •
What can go wrong in broadband links? Back-up plans in the event of cable cuts or other carrier outages:
• What are affordable options for small organizations? WiMAX tower
PSTN Cell tower
Internet Verizon equipment
AT&T equipment
Carriers’ Managed Services For a fee (naturally) carriers will manage: Routers T-1/T-3 multiplexers Ethernet switches The data center Security Remote access
MPLS Quality of service Latency
Wireless devices Call center consulting Back-up Staffing productivity
Summary • • • • • • • • • •
T-1/E1 T3/E3 Gigabit Ethernet MPLS IP VPNs SIP trunking Vulnerability to cable cuts and other outages Security Topology Managed services