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920-530 exam Dumps Source : Carrier VoIP UA-IP Commissioning and Nodal Integration
Test Code : 920-530
Test title : Carrier VoIP UA-IP Commissioning and Nodal Integration
Vendor title : 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 help its mobilephone community with superior capabilities, to live 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 multiply a customer's adventure for Hyperconnectivity, an rising period of communications the residence the comfort that will furthermore live related should live related. With these options, APUA's shoppers can lengthen their functions and might live 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 materiel 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 advocate drive company through permitting us to supply their purchasers all-in-one solutions."
"With the increasing exact for more advantageous multimedia functions, voice, video and records functions pushed by Hyperconnectivity, networks must live organized for the challenges and alternatives offered by using the instant necessity for suggestions on-the-go. Carriers are seeking alternatives to help 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 originate inescapable a simplified and efficient community convergence that can reason expanded services and revenues."
The solution for APUA will encompass Nortel communique Server 2000, a unique era IP softswitch to alleviate meet starting to live subscriber exact for subsequent generation voice functions. APUA's solution will furthermore consist of Nortel's Metro Ethernet Routing change 8600, Alteon at ease Firewall and Nortel's Optical Multiservice fraction 6130 compact packet optical platform, with a purpose to facilitate the future exhaust 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 chore 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 fleet messaging. Nortel's world features portfolio includes a complete purview of purposes, implementation, management and lead for end-to-end multi-dealer, multi-technology networks.
Nortel's provider VoIP options are IMS-capable and were designed to supply for an effortless 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, any property, rights and liabilities of the govt of Antigua's electrical energy, Water, and cellphone Departments as of 4th July 1973, occupy been vested within the Authority.
The Authority has unique rights to carry out the following actions in the situation 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 originate the plight of commerce Made essential a verity for their consumers. Their next-era technologies, for both carrier provider and enterprise networks, lead multimedia and company-crucial purposes. Nortel's applied sciences are designed to aid purge modern day limitations to efficiency, velocity and efficiency by simplifying networks and connecting individuals to the guidance they need, when they necessity 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 circle 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 carve 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 benevolent a mesh, increasing the WLAN hotspot.
"The administration toil 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 necessity for radio frequency engineering or commissioning, enabling installation in any residence the residence energy is available, greatly expanding the attain of instant LAN insurance. previously, an in depth radio frequency design had to live finished in order to live confident that insurance of each access constituent 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 endeavor 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 constituent installation with the aid of individuals within an commercial enterprise more straightforward. "The wireless meshed network would live in a position to automatically keep a rogue access aspect, whenever they seem," explained Goldie.
As fraction of Nortel Networks commerce 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 any valuable for instant deployments in open areas or the residence 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 constituent will necessity to live connected to a wired network," noted Goldie. "For the meshed community, it's feasible to simply exhaust a solitary wired feed and occupy the complete network access supported in the course of the solitary wire feed with the entire access points meshed prerogative into a solitary entire network."
records can exhaust 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 furthermore live used in campus situation or in mining areas or within the core of the wasteland the residence 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 materiel reminiscent of microwave oven, the network can live capable of keep and supply continuous lead 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 pile may additionally comprehend embedding solar technologies into the entry aspects to live able to benevolent meshed networks not constrained by passage of the positioning of vigour retailers.
The structure furthermore 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 tribulation tasks occupy been began late final year and are anticipated to live achieved soon. based on Goldie, there will live more trials to live 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 unique high-speed IP network in the country.
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After a number of fallacious promises that started in 1998, convergence may finally live 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 originate it feasible to transfer more information over the Internet in more efficient ways.
The biggest promote in terms of technology will involve the transmission of voice communications over the Internet, which will enable businesses to reduce or purge long distance toll charges. unique cabling will originate it feasible to exhaust a solitary structured cabling system to advocate a number of functions in a building. And software simplification will enable system designers to exhaust the Ethernet network protocol to serve numerous devices within a pile and beyond.
Let’s leer at each one of these topics in a Little more detail.
Technology convergence. The eventual blending of voice and data on a solitary network seems to live a given. However, the technology, called Voice over IP (VoIP), doesn’t yet occupy the traditional reliability and attribute of service create 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 muster over the selfsame 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 furthermore eliminates the toll charges usually paid to a long distance carrier. Generally, the network has to live IP-based. In addition, 100BaseT Ethernet must live perfected and the problems of voice echo, delay (or latency), and firewall security must live 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 toil with a company’s customer relationship management database, giving employees near-instant access to customer data. Remote office workers and telecommuters especially delight in a host of communications features to alleviate 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 exact 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 live widely used in business, it will live necessary to supply dependable electric power at each IP telephone in a pile so the telecommunications system isn’t lost every time the system is hit by a power outage. exact is furthermore growing for the delivery of electric power to wireless access points, security cameras, access control equipment, and other devices, any of which can furthermore quicken on an Ethernet network. How conclude you advocate these widely scattered devices in a pile with electric power?
The answer can live create in a unique IEEE yardstick known as Power over Ethernet (PoE) [IEEE Std. 802.3af], which describes the exhaust of power sourcing materiel (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 selfsame 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 necessity for a sunder 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, faultfinding functions can remain operational if the pile electric power system fails. By following the standard, a solitary UPS installed at the network core can provide backup for many devices attached to the LAN. The IEEE Std. 802.3af furthermore provides guidance on remote access and management via SNMP Web-based control.
An notable value of the yardstick 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 conclude of the cable. It furthermore continues to monitor the channel in case a unique device is inserted into the network.
A number of unique 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 advocate systems, such as security, life/safety, radio paging, lighting controls, audio/visual, and automation. This situation creates a cross for the facility owner because he or she has to deal with a proliferation of cable and materiel closets. Generally, each system has its own conduit, cable tray, or cabling system, which connects hardware and software. In addition, these various systems rob up valuable space, and they usually don’t communicate with one another.
However, with the availability of open protocols (nonproprietary software) and networking standards, pile 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 originate 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 region networks, security, audio/video, and other types of low-voltage wiring into a unique Division 17, thereby removing this toil from Division 16.
As it turns out, the unique CSI 2004 MasterFormat places most low-voltage services, or specialties, within three unique divisions: 27 - Communications (C), 28 - Electronic [Life] Safety and Security (L), and 25 - Integrated Automation and Control (A). These three letters originate up the acronym CLA.
In his inaugural speech at the annual commerce 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 basis 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 any the information and communications in an integrated/automated pile will travel is going to be—or should be—the pile LAN, which can advocate 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 unique paradigm, who will live the integrator of the total project? The MasterFormat doesn’t allocate trade or design jurisdiction to anyone; it simply defines and organizes the toil functions.
So how does the decrepit model compare with the new? The decrepit 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 unique MasterFormat model, which employs the CLA concept, is standards-based with complete owner involvement and vendor influence.
The Baltimore meeting had a success tale relating to the CLA model used on a recent pile systems integration project. David Brooks, PE, and co-worker Plant Rodgers, RCCD, Affiliated Engineers, Inc., Gainesville, Fla., were able to exhaust a unique TIA/EIA yardstick when renovating three buildings at the University of Cincinnati. Brooks and Rodgers applied the TIA/EIA-862, “Building Automation Cabling yardstick for Commercial Buildings,” on the project, which showed how it’s feasible 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 furthermore 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 sunder system, this wiring ran adjacent to the LAN cabling in cable trays and other pathways.
Brooks noted that the BAS industry silent uses screw terminals on its equipment, whereas a modular yardstick connector interface, such as an 8-pin modular jack, would live preferred. In addition, vendors exhaust RS-485 and RS-422 daisy-chained networks.
Within the horizontal cabling run, TIA/EIA-862 introduces two terms not create in TIA/EIA-568: horizontal connection point (HCP) and coverage region 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 quicken between the telecom latitude and the user/device. Coverage region 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 region networks, points of presence, and wide region networks. In pile 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 any the conversion discussion, several spirited 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 necessity 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 cease Products, Robertsdale, Ala., underscored the concept 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 alleviate in product selection and using the Internet to gain more knowledge.
Richard Roux, Info Systems, Inc., Wilmington, Del., explained the three voice attribute 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 comprehend the exhaust of echo cancellation materiel and configuring the router to prioritize voice traffic.
Brian Mordick, Hoffman Enclosures, Anoka, Minn., offered insight into the necessity to reduce electromagnetic interference (EMI) radiation in telecom systems, and specifically discussed the construction of enclosures and cabinets. unique computers are operating at 5 GHz to 8 GHz, resulting in the increased necessity for shielding to thwart feasible interception of sensitive data by terrorists. Cabinets should occupy continuous conductivity between the door and corpse 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, exact for greater efficiency, and requirement for cross-agency coordination any point to the necessity 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 furthermore feature more efficient and more resilient advocate of legacy TDM-based applications.
Employ backhauling as a strategic asset
For backhauling mission-critical voice and sensor traffic, traditional public safety communications networks exhaust PDH and/or SDH/SONET-based TDM technologies. But times occupy changed. Many unique 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 skedaddle to IP enables improved interoperability, superior performance, and economies of scale, as well as better integration with IT applications—much needed steps in the prerogative direction.
Now let’s circle to some key considerations when pile packet-based mobile backhaul for an upgraded LMR/PMR network.
Resiliency and fleet recovery
Strong resiliency is requisite for a public safety communications network carrying mission-critical voice, video, and data. lofty 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 exhaust fully redundant platform that supports hitless control/fabric protection—a histrionic 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. any of this, combined with fleet switching and fleet vice detection, enable vice detection time to the very low 10s of milliseconds, and then the ability to reroute connections at SDH/SONET speeds.
The network should furthermore advocate advanced topologies—multi-ring, necklace and hybrid— to help robustness. In particular, when fully capitalized by dynamic IP/MPLS, multi-ring’s moneyed 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 conclude so efficiently, public safety organizations should live able to merge and match transmission media—microwave, fiber, copper, and even 3rd-party leased lines—when pile a mission-critical network. Backhauling materiel that supports transmission layer integration is vital.
A consolidated and simplified network design and operations for any network sites is feasible 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 live 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 exhaust it. Highly economical, vulgar WDM (CWDM) allows up to 8 times 1 Gbps and/or 10 Gbps wavelengths to live carried on the selfsame strand of fiber.
Advanced traffic management and attribute of service
To deliver service guarantee and differentiation on a packet-based backhaul, a sturdy 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 faultfinding application performance parameters, such as bandwidth, delay, and jitter. In particular fragmentation and interleaving are key techniques to preserve jitter under control on lower quicken links.
To safeguard their faultfinding infrastructure, networks must occupy extensive integrated security features. These guard against cybersecurity threats, ensure communications and data privacy, and alleviate 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 live taken, such as access control lists, traffic rate controls, user authentication, authorization and accounting, encryption, or label switch paths.
But threats can furthermore gain from within the agency. detailed event logging, and features such as user profiles that confine an employee’s scope of network access, can furthermore mitigate risk.
Microwave links are inherently secure. However, for locations vulnerable to eavesdropping, layer 1 FIPS-197 compliant encryption can live applied.
IP/MPLS-based networks are ideal for multiservice backhauling, delivering superior performance and economies of scale. Multiservice backhaul networks can live 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 live used for the foreseeable future. Consequently, the resilience and performance of a unique backhaul network should resemble that of a TDM-based network. This is achieved with pseudowire based circuit switched emulation that can live 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 complete purview of MPLS-based VPN services occupy been deployed in numerous mission-critical networks and occupy been proven by commercial carriers in taxing environments.
Prepare for LTE
Future LTE deployments necessity to live 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 furthermore enable installation versatility for petite enclosures and complete outdoor environments.
At the selfsame time, a solitary 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, vice detection, and management) and optimizes end-to-end network performance.
A service-aware network manager can maximize any these network management synergies while extending coverage to the microwave and optical transport domains, as well as the LTE domain.
The passage forward
As cost-constraints rob hold and exact and citizen expectations increase, public safety organizations will live drawn to evolutionary solutions that preserve OPEX and CAPEX in check while meeting unique performance requirements.
The passage 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 passage for LTE.
 Legacy interfaces include: E&M, FSX/FSO, V.24/V.35/X.21 serial
To contact the authors or request additional information, gratify transmit an email to firstname.lastname@example.org .
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