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920-530 exam Dumps Source : Carrier VoIP UA-IP Commissioning and Nodal Integration
Test Code : 920-530
Test Name : Carrier VoIP UA-IP Commissioning and Nodal Integration
Vendor Name : Nortel
: 100 Real Questions
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Firewallssolutions anticipated TO aid expand MARKET SHARE
DECEMBER 10, 2007
ANTIGUA - Antigua Public Utilities Authority (APUA), a leading provider of utility and communications features in Antigua and Barbuda, has chosen Nortel* [NYSE/TSX: NT] to improve its mobilephone community with superior capabilities, to be able to provide patrons and businesses in Antigua with built-in voice, video and information in addition to local and long distance services. The upgrade is designed to offer purchasers extra aggressive and finished service applications. furthermore, the solution contains Nortel's international features portfolio to seamlessly transition latest functions to the upgraded next technology community.
Nortel know-how and features enable APUA to easily evolve to a converged community combining voice, information and video aspects that will increase a customer's adventure for Hyperconnectivity, an rising period of communications the place the rest that will also be related should be related. With these options, APUA's shoppers can lengthen their functions and might be reached regardless of where they are on earth, so long as there is a high-pace web connection. this manner, their phone number, messages and electronic mail, shuttle with them on whatever thing cellular equipment they connect with the internet, as a result permitting for real mobility.
"Nortel's IP more advantageous technology allows us to give consumers with superior capabilities so that you can enhance the communications experience by allowing them to extend their communications beyond ordinary telephony, to wherever they are discovered globally, throughout multiple devices," talked about Esworth Martin, time-honored supervisor, APUA. "Leveraging Nortel's solutions offers us a aggressive aspect in order to support drive company through permitting us to supply their purchasers all-in-one solutions."
"With the increasing demand for more advantageous multimedia functions, voice, video and records functions pushed by Hyperconnectivity, networks must be organized for the challenges and alternatives offered by using the instant need for suggestions on-the-go. Carriers are seeking alternatives to improve latest networks in a value-productive and reliably method," talked about Ray Bulengo, vp, carrier income, Nortel Caribbean vicinity and Bermuda. "Nortel helps agencies reminiscent of APUA with the aid of providing a dependable and aggressive IP based mostly portfolio offering to make certain a simplified and efficient community convergence that can cause expanded services and revenues."
The solution for APUA will encompass Nortel communique Server 2000, a new era IP softswitch to help meet starting to be subscriber demand for subsequent generation voice functions. APUA's solution will also consist of Nortel's Metro Ethernet Routing change 8600, Alteon at ease Firewall and Nortel's Optical Multiservice part 6130 compact packet optical platform, with a purpose to facilitate the future use of alternate off-island fiber optic transport.
Nortel will supply network integration, aid and software functions from the Nortel world functions portfolio. this could consist of task management, setting up and commissioning; web site, community and database engineering; utility protection; and implementation of SIP-primarily based multimedia capabilities like advert-hoc audio and video conferencing, song on-hang/bulletins, and fast messaging. Nortel's world features portfolio includes a full range of purposes, implementation, management and guide for end-to-end multi-dealer, multi-technology networks.
Nortel's provider VoIP options are IMS-capable and were designed to supply for an easy evolution to IMS services. according to Dell'Oro neighborhood, Nortel is the international chief in provider VoIP and has been for five consecutive years (2002-2006).
About Antigua Public Utilities Authority
Antigua Public Utilities Authority ('the Authority' or 'APUA') turned into included beneath the public Utilities Act, 1973. On graduation of the Act, all property, rights and liabilities of the govt of Antigua's electrical energy, Water, and cellphone Departments as of 4th July 1973, have been vested within the Authority.
The Authority has unique rights to carry out the following actions in the State of Antigua & Barbuda:o The generation, distribution, provide and sale of electrical energy;o the availability of phone capabilities for calls originating and ending in the State;o The provide, distribution, preservation and sale of water features and;o Any incidental features relative to the above.
Nortel is a diagnosed leader in delivering communications capabilities that make the promise of business Made essential a truth for their consumers. Their next-era technologies, for both carrier provider and enterprise networks, guide multimedia and company-crucial purposes. Nortel's applied sciences are designed to aid eliminate modern day limitations to efficiency, velocity and efficiency by simplifying networks and connecting individuals to the guidance they need, when they need it. Nortel does company in more than 150 nations around the world. For extra assistance, consult with Nortel on the net at www.nortel.com. For the latest Nortel information, talk over with nortel.com/news.
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Computerworld Singapore –
A self-healing and self-adaptive wireless community infrastructure -- the stuff of network directors' dreams -- is anticipated to turn into a fact in June this 12 months, following pilots of wireless meshed network expertise conducted via Nortel Networks and the Massachusetts Institute of technology.
The instant meshed network structure comprises auto-discovery and self-curative algorithms to simplify deployment and cut back service outages through optimizing radio hyperlink communications and minimizing interference. It creates a community entry community (CAN), which is a cluster of wireless access facets that kind a mesh, increasing the WLAN hotspot.
"The administration work increases exponentially when the access facets enhance from two or three to 200 or 300 access features," observed Philip Goldie (left), Product advertising, Alteron, Asia Pacific, Nortel Networks.
The self-organizing nature of the architecture gets rid of the need for radio frequency engineering or commissioning, enabling installation in any place the place energy is available, greatly expanding the attain of instant LAN insurance. previously, an in depth radio frequency design had to be finished in order to be sure that insurance of each access element did not intervene with an extra.
"The instant meshed community is a self-healing network," observed Goldie. "When a failed access point appears, the network can dynamically elevate the energy of surrounding access aspects to give coverage for the missing enviornment."
this is executed by using yet another radio frequency to talk between adjoining access facets in an effort to remember the status of adjacent entry elements in addition to route records in the course of the other entry aspects. The self-curative, self-discovery features allow the gadget to dynamically re-provision itself.
additionally, the structure additionally makes the job of picking unlawful or unauthorized entry element installation with the aid of individuals within an commercial enterprise more straightforward. "The wireless meshed network would be in a position to automatically observe a rogue access aspect, whenever they seem," explained Goldie.
As part of Nortel Networks business with out Boundaries vision, the architecture turned into designed to supply the applicable stage of network access and safety while supporting the unrestricted mobility of conclusion users.
The wireless Mesh structure is above all valuable for instant deployments in open areas or the place no LAN infrastructure exists, similar to warehouse and institution campus environments. This solution replaces the wired backhaul or transit hyperlink with a wireless link, doing away with the should install extra LAN cabling and other infrastructure to extend WLAN provider beyond the attain of the present LAN.
"within the common setup, every instant access element will need to be connected to a wired network," noted Goldie. "For the meshed community, it's feasible to simply use a single wired feed and have the complete network access supported in the course of the single wire feed with the entire access points meshed right into a single entire network."
records can use multi-hop, instant backhaul in closing mile from a wired broadband connection point to route out of the wireless community.
"The structure solves a fundamental enterprise issue," observed Goldie. "It can also be used in campus situation or in mining areas or within the core of the wasteland the place the environment is not wired up."
an additional feature of the meshed community is that it offers constant first-class of carrier. When the energy of the entry points are being suffering from different home equipment reminiscent of microwave oven, the network can be capable of observe and supply continuous guide with the aid of bringing up the electricity of the entry facets.
in accordance with Goldie, each and every entry factor is AC powered and needs a power outlet at the moment. however, future building may additionally include embedding solar technologies into the entry aspects to be able to kind meshed networks not constrained by way of the positioning of vigour retailers.
The structure also requires a wireless gateway to advertise reachability in the commercial enterprise for one or extra IP subnets assigned to WLAN CAN subscribers and community entities.
The Optivity network administration system (ONMS) will deliver centralized amenities for monitoring and managing the network operations.
The trial tasks have been began late final year and are anticipated to be achieved soon. based on Goldie, there will be more trials to be install by using tutorial centers and carriers stepping into the market.
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ECI Telecom, a global provider of networking infrastructure solutions optimized for next-generation network (NGN) migration, today announced that Togo Telecom, the incumbent fixed line operator in Togo, Africa, has selected ECI to deliver an end-to-end turnkey solution for a new high-speed IP network in the country.
This turnkey project will deliver one of the first fiber-to-the-curb (FTTC) networks in the region, providing residential and business customers with high-speed Internet access and VoIP services.
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After a number of false promises that started in 1998, convergence may finally be coming to the telecommunications industry. Conversations at the BICSI Spring Conference in Baltimore, May 3 to 6, 2004, indicated that convergence in the areas of technology, cabling, and software will make it possible to transfer more information over the Internet in more efficient ways.
The biggest advance in terms of technology will involve the transmission of voice communications over the Internet, which will enable businesses to reduce or eliminate long distance toll charges. New cabling will make it possible to use a single structured cabling system to support a number of functions in a building. And software simplification will enable system designers to use the Ethernet network protocol to serve numerous devices within a building and beyond.
Let’s look at each one of these topics in a little more detail.
Technology convergence. The eventual blending of voice and data on a single network seems to be a given. However, the technology, called Voice over IP (VoIP), doesn’t yet have the traditional reliability and quality of service found in the Public Switched Telephone Network (PSTN), in which the voice customer receives a dedicated circuit and the connection is maintained for the entire duration of the call.
In sending a telephone call over the same network that carries data through copper or fiber cabling, the voice stream is divided into packets, sent out to the network, and then reassembled at the receiving end. Running voice communications over the Internet also eliminates the toll charges usually paid to a long distance carrier. Generally, the network has to be IP-based. In addition, 100BaseT Ethernet must be perfected and the problems of voice echo, delay (or latency), and firewall security must be solved.
IP telephony delivers real and measurable benefits. It allows a company to deploy unified messaging as well as advanced, “find-me/follow-me” capabilities, personal calendars, and meeting schedulers. Furthermore, unlike traditional phone systems, an IP-based telephony solution can work with a company’s customer relationship management database, giving employees near-instant access to customer data. Remote office workers and telecommuters especially enjoy a host of communications features to help boost productivity. According to a recent survey by Sage Research, Natick, Mass., half of the respondents noted that they saved almost four hours a week per employee by reducing “telephone tag.”
Amid this surging demand for voice-over IP gear and services, Cisco Systems and IBM recently formed a partnership to boost adoption of VoIP technology. The vendors will jointly develop and sell VoIP products and services, enabling companies to buy a package of Cisco’s IP-telephony software and hardware and IBM’s services and integration capabilities.
However, if IP telephones are to be widely used in business, it will be necessary to supply reliable electric power at each IP telephone in a building so the telecommunications system isn’t lost every time the system is hit by a power outage. Demand is also growing for the delivery of electric power to wireless access points, security cameras, access control equipment, and other devices, all of which can also run on an Ethernet network. How do you support these widely scattered devices in a building with electric power?
The answer can be found in a new IEEE standard known as Power over Ethernet (PoE) [IEEE Std. 802.3af], which describes the use of power sourcing equipment (PSE) and powered devices, and the delivery of power over the unshielded twisted-pair conductors of the network cabling system. PoE provides as much as 12.95W of continuous power at 48V over the same Cat. 5, Cat. 5E, and Cat. 6 horizontal cabling that carries the 10/100/1,000Mb Ethernet service. With a maximum current of 350mA, this limited power is delivered over two conductors of the four pair in the cable, thus eliminating the need for a separate AC outlet to serve each node or device on the network. A typical IP phone or a remote camera generally consumes between 3.5W to 10W of power.
When used in conjunction with a UPS system and integrated with network management tools, critical functions can remain operational if the building electric power system fails. By following the standard, a single UPS installed at the network core can provide backup for many devices attached to the LAN. The IEEE Std. 802.3af also provides guidance on remote access and management via SNMP Web-based control.
An important value of the standard is that PoE is completely compatible with existing Ethernet switches and networked devices. Because the PoE tests whether a networked device is PoE-capable, power is never transmitted unless a powered device is at the other end of the cable. It also continues to monitor the channel in case a new device is inserted into the network.
A number of new rack-mounted products that insert power into the horizontal cabling were displayed at the conference.
Cabling convergence. Today’s buildings are equipped with a number of support systems, such as security, life/safety, radio paging, lighting controls, audio/visual, and automation. This situation creates a burden for the facility owner because he or she has to deal with a proliferation of cable and equipment closets. Generally, each system has its own conduit, cable tray, or cabling system, which connects hardware and software. In addition, these various systems take up valuable space, and they usually don’t communicate with one another.
However, with the availability of open protocols (nonproprietary software) and networking standards, building owners now want to design, build, and maintain their low-voltage services with greater coordination and integration, since low-voltage wiring and electronic gear now make up a larger portion of a building’s total cost. Thus, in June 2000, the Construction Specifications Institute (CSI) started updating the 1995 edition of its MasterFormat system for construction specifications. BICSI and other industry organizations proposed splitting off telecommunications, local area networks, security, audio/video, and other types of low-voltage wiring into a new Division 17, thereby removing this work from Division 16.
As it turns out, the new CSI 2004 MasterFormat places most low-voltage services, or specialties, within three new divisions: 27 - Communications (C), 28 - Electronic [Life] Safety and Security (L), and 25 - Integrated Automation and Control (A). These three letters make up the acronym CLA.
In his inaugural speech at the annual business meeting in January, the president of BICSI, Russell Oliver, vice president of operations for CTC Communications, Waltham, Mass., discussed the evolution underway in the telecommunications field. “Our traditional telecommunications base is expanding to become a communications, life safety, and automation industry, including wireless, security, voice, data, audio/visual and automation,” he said.
It’s fairly obvious that the bus over which all the information and communications in an integrated/automated building will travel is going to be—or should be—the building LAN, which can support these other services.
However, the 2004 MasterFormat revision requires a master-planning phase, a design phase, an installation phase, and then commissioning. The obvious question then becomes, Since this is a new paradigm, who will be the integrator of the whole project? The MasterFormat doesn’t assign trade or design jurisdiction to anyone; it simply defines and organizes the work functions.
So how does the old model compare with the new? The old MasterFormat model is code-based with mechanical, electrical and plumbing as the core services in a building. It’s architecturally focused and vendor neutral, with the owner doing a review. The new MasterFormat model, which employs the CLA concept, is standards-based with full owner involvement and vendor influence.
The Baltimore meeting had a success story relating to the CLA model used on a recent building systems integration project. David Brooks, PE, and co-worker Plant Rodgers, RCCD, Affiliated Engineers, Inc., Gainesville, Fla., were able to use a new TIA/EIA standard when renovating three buildings at the University of Cincinnati. Brooks and Rodgers applied the TIA/EIA-862, “Building Automation Cabling Standard for Commercial Buildings,” on the project, which showed how it’s possible to select the voice/data communications cabling as the first system and then incorporate other CLA systems into the telecom cabling distribution system.
The consulting firm provided complete wiring diagrams, including three-dimensional drawings at cabling cross-connect racks, which showed the wiring system in detail. They also provided a demarcation point for the telecom contractor and held meetings on-site to coordinate the rough-in, the cabling, and final phases of the installation. Although the fire/life safety cabling is a separate system, this wiring ran adjacent to the LAN cabling in cable trays and other pathways.
Brooks noted that the BAS industry still uses screw terminals on its equipment, whereas a modular standard connector interface, such as an 8-pin modular jack, would be preferred. In addition, vendors use RS-485 and RS-422 daisy-chained networks.
Within the horizontal cabling run, TIA/EIA-862 introduces two terms not found in TIA/EIA-568: horizontal connection point (HCP) and coverage area cable. The HCP is similar to the consolidation point (CP) used in open office zone cabling noted in TIA/EIA-568-B.1, since both are located somewhere in the horizontal cabling run between the telecom room and the user/device. Coverage area cable is the portion of the horizontal cabling that connects either the BAS outlet or the HCP to the BAS device.
Software convergence, or simplification. Traditionally regarded as a LAN transport technology, Ethernet has become the most popular and widely used network protocol, because it’s reliable, economical, and scalable. This protocol has developed to encompass 10Gigabit speeds, expanding applications in metropolitan area networks, points of presence, and wide area networks. In building automation, the second tier is now TCP/IP over Ethernet, and it can easily serve wireless communications. For example, 37 manufactures of HVAC, lighting, and fire systems provided a demonstration of a wireless Ethernet backbone at an ASHRAE meeting in 2000.
Technical sessions. In addition to all the conversion discussion, several interesting technical sessions took place, including the following:
Mark Harger, Harger Lightning & Grounding, Grayslake, Ill., spelled out the components of a high-frequency ground system, identifying the components and thus providing a better understanding of the need for such a system in a data center. He explained the installation of a signal reference grid, low-impedance bonding straps, and bare copper bonding conductors beneath the floor in a typical data center.
Mike Tobias, Unique Fire Stop Products, Robertsdale, Ala., underscored the idea that firestopping requirements are code-driven and that installing contractors should become fluent in UL nomenclature and know how to select the best system for an application. He recommended calling on manufacturers for help in product selection and using the Internet to gain more knowledge.
Richard Roux, Info Systems, Inc., Wilmington, Del., explained the three voice quality issues: jitter, clipping, and echo on a voice-over-IP circuit. An echo is often present on voice networks but isn’tt always perceived by the human ear. However, it becomes a problem when the delay is more than 25 milliseconds. Solutions to this problem include the use of echo cancellation equipment and configuring the router to prioritize voice traffic.
Brian Mordick, Hoffman Enclosures, Anoka, Minn., offered insight into the need to reduce electromagnetic interference (EMI) radiation in telecom systems, and specifically discussed the construction of enclosures and cabinets. New computers are operating at 5 GHz to 8 GHz, resulting in the increased need for shielding to thwart possible interception of sensitive data by terrorists. Cabinets should have continuous conductivity between the door and body perimeter. Spring steel fingers, conductive mesh, and conductive gasketing are three methods for achieving shielding of radiated energy in a cabinet.
By: Jérôme Brouet, Public Safety Solution Director, Alcatel-Lucent
From original Alcatel-Lucent TechZine posting
Increased number of security threats, demand for greater efficiency, and requirement for cross-agency coordination all point to the need to modernize public safety communications networks toward IP and broadband. And, backhauling is at the forefront of this evolution.
The rationale for the evolution of public safety backhaul networks is twofold:
By deploying a converged MPLS-based backhaul network now, public safety organizations can address current and future requirements for public safety IP communications while controlling costs. And when properly designed, mission-critical public safety transport networks also feature more efficient and more resilient support of legacy TDM-based applications.
Employ backhauling as a strategic asset
For backhauling mission-critical voice and sensor traffic, traditional public safety communications networks use PDH and/or SDH/SONET-based TDM technologies. But times have changed. Many new applications are media-rich and computing-resource-intensive, so they require larger, fluctuating amounts of bandwidth.
Consequently, public safety agencies are swapping dedicated TDM-based backhaul networks with converged packet based backhaul to deliver broadband-based multimedia applications. These MPLS-based networks can transport first responder traffic coming, for instance, from:
Further, this move to IP enables improved interoperability, superior performance, and economies of scale, as well as better integration with IT applications—much needed steps in the right direction.
Now let’s turn to some key considerations when building packet-based mobile backhaul for an upgraded LMR/PMR network.
Resiliency and fast recovery
Strong resiliency is indispensable for a public safety communications network carrying mission-critical voice, video, and data. High reliability and resiliency for uninterrupted operations is essential and platform protection is crucial.
Gone are the days of the 2-node architecture. State-of-the-art networks use fully redundant platform that supports hitless control/fabric protection—a dramatic improvement. Plus, the high-availability features provide for unparalleled availability and reliability—essential for aggregation sites, as they ensure that a control card failure has no service impact. All of this, combined with fast switching and fast fault detection, enable fault detection time to the very low 10s of milliseconds, and then the ability to reroute connections at SDH/SONET speeds.
The network should also support advanced topologies—multi-ring, necklace and hybrid— to improve robustness. In particular, when fully capitalized by dynamic IP/MPLS, multi-ring’s rich path diversity provides the highest redundancy protection even during a disaster.
Versatility and efficiency
A backhaul network often spans dense urban areas and remote environments. To do so efficiently, public safety organizations should be able to mix and match transmission media—microwave, fiber, copper, and even 3rd-party leased lines—when building a mission-critical network. Backhauling equipment that supports transmission layer integration is vital.
A consolidated and simplified network design and operations for all network sites is possible along with consistent commissioning and operations procedures—regardless of the medium.
The most common transmission medium is packet microwave complemented by optical fiber. For microwave, depending on geography and site constraints, either outdoor or indoor microwave radios can be deployed. And, to maximize bandwidth throughput of available microwave spectrum, the following advanced microwave capabilities are of utmost importance:
When fiber is available, public safety operators should use it. Highly economical, coarse WDM (CWDM) allows up to 8 times 1 Gbps and/or 10 Gbps wavelengths to be carried on the same strand of fiber.
Advanced traffic management and quality of service
To deliver service guarantee and differentiation on a packet-based backhaul, a strong QoS mechanism with advanced traffic management capabilities is a must. The backhaul network should incorporate an extensive set of traffic management tools, such as advanced hierarchical scheduling and prioritization mechanisms.
These techniques optimize uplink utilization while maintaining maximum isolation and fairness among application traffic flows. This allows the network to always meet critical application performance parameters, such as bandwidth, delay, and jitter. In particular fragmentation and interleaving are key techniques to keep jitter under control on lower speed links.
To safeguard their critical infrastructure, networks must have extensive integrated security features. These defend against cybersecurity threats, ensure communications and data privacy, and help deliver uninterrupted services. Specifically, robust mechanisms are needed to protect the management, control, and data planes against security threats originating from outside or inside the agency.
For external threats, a host of security measures can be taken, such as access control lists, traffic rate controls, user authentication, authorization and accounting, encryption, or label switch paths.
But threats can also come from within the agency. Detailed event logging, and features such as user profiles that limit an employee’s scope of network access, can also mitigate risk.
Microwave links are inherently secure. However, for locations vulnerable to eavesdropping, layer 1 FIPS-197 compliant encryption can be applied.
IP/MPLS-based networks are ideal for multiservice backhauling, delivering superior performance and economies of scale. Multiservice backhaul networks can be deployed in various topology and connectivity configurations as required by public safety applications.
The challenge, though, is that legacy- and TDM-based traffic will continue to be used for the foreseeable future. Consequently, the resilience and performance of a new backhaul network should resemble that of a TDM-based network. This is achieved with pseudowire based circuit switched emulation that can be applied across a wide portfolio of legacy and T1/E1 TDM interfaces.
Support for these interfaces is required to migrate public safety applications gracefully. In addition, IP/MPLS based networks allow for improved interoperability and integration with IT applications.
Even now, a full range of MPLS-based VPN services have been deployed in numerous mission-critical networks and have been proven by commercial carriers in taxing environments.
Prepare for LTE
Future LTE deployments need to be built on a solid foundation—a network that is resilient, versatile, efficient, and that recovers rapidly.
IP/MPLS backhaul networks should scale seamlessly to accommodate different interface speeds and capacity requirements depending on the location in the network. They should also enable installation versatility for small enclosures and full outdoor environments.
At the same time, a single end-to-end network management platform—including the backhauling and the LTE radio and core access network—is needed. This simplifies operations (configuration, provisioning, supervision, fault detection, and management) and optimizes end-to-end network performance.
A service-aware network manager can maximize all these network management synergies while extending coverage to the microwave and optical transport domains, as well as the LTE domain.
The way forward
As cost-constraints take hold and demand and citizen expectations increase, public safety organizations will be drawn to evolutionary solutions that keep OPEX and CAPEX in check while meeting new performance requirements.
The way forward for these organizations is with IP/MPLS-based backhaul networks. This path allows public safety operators to modernize their mission-critical networks and paves the way for LTE.
 Legacy interfaces include: E&M, FSX/FSO, V.24/V.35/X.21 serial
To contact the authors or request additional information, please send an email to email@example.com .
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