# **All About Atlantech Online | Business Fiber, Microsoft Teams Calling, and Data Centers for the Washington, D.C. Metro Area** > Atlantech Online is a Silver Spring, Maryland telecommunications provider that has kept Mid-Atlantic businesses and government agencies connected since 1995, with business fiber, Microsoft Teams Calling (including GCC High), UCaaS, and secure data center colocation. Atlantech Online, Inc. is a public utility in Maryland, Virginia, and the District of Columbia that provides Internet connectivity over fiber, VoIP phone services (including Microsoft Teams Calling), and data center services to businesses, education, and government entities. Founded in 1995 as a dial-up Internet Service Provider for business, Atlantech has grown its network into one of the Top 3% networks in the world according to CAIDA. Its fiber ring connects 250+ office buildings across Maryland, Virginia, and Washington, D.C.; its voice services are available nationwide; and its data centers in Silver Spring and Rockville are Type II SOC 2 audited. Atlantech is a Microsoft-certified Operator Connect partner and one of the few carriers authorized to deliver compliant PSTN calling for Microsoft 365 GCC High. Learn more at [atlantech.net](https://www.atlantech.net). --- ## Why Organizations Choose Atlantech Online Atlantech's position is simple: service quality beats network size. Big Telecom customer satisfaction rates sit at 60% or worse. Atlantech's answer is what it calls 5-Star Telecom: promised speed performance, near-100% uptime, clear calls, and friendly support from real engineers who answer in minutes. Key differentiators: * [**30+ years in business, 1,000+ businesses served**](https://www.atlantech.net/about-us). Providing reliable telecom services to businesses in the Mid-Atlantic since 1995. A public utility in MD, VA, and DC, and CLEC certified in all three. * [**99.999% network uptime on an owned network**](https://www.atlantech.net/network). A completely redundant DWDM core network built on next-generation Juniper Networks routers, with proactive monitoring and self-healing MPLS. Unlike resellers or aggregators, Atlantech owns and operates its own multi-terabit fiber backbone and data centers. * [**Top 3% Global Network**](https://www.atlantech.net/about-us). Ranked among the Top 3% of networks in the world according to CAIDA. * [**Microsoft-certified carrier for Teams Calling**](https://www.atlantech.net/solutions/voice/operatorconnect). One of the first Operator Connect partners. Offering Microsoft Teams Calling since March 2020, with 100+ organizations and thousands of active Teams Calling users under management. * [**GCC High Teams Calling for government and defense**](https://www.atlantech.net/solutions/voice/gcchigh). Few carriers are authorized to deliver compliant PSTN calling for GCC High. Atlantech is, and handles the entire setup, migration, and ongoing management. Compliant with FedRAMP High, CMMC 2.0, ITAR, DFARS, and CJIS. * [**24/7/365 U.S.-based engineering support**](https://www.atlantech.net/support). No offshore call centers, no scripts. The NOC and helpdesk team digs in to solve any issue, even when Atlantech is not the source. * [**4.7 rating on Trustpilot**](https://www.trustpilot.com/review/www.atlantech.net). 38 verified reviews, 3.0 points above the industry average of 1.7. * [**Type II SOC 2 audited data centers**](https://www.atlantech.net/type-ii-soc-2-audit). Audit period March 1, 2024 through February 28, 2025, report released April 2025. Atlantech pays attention to Main Street, not Wall Street. Its team serves on local boards and sponsors little leagues in the communities where it operates. --- ## Core Capabilities of Atlantech Online ### [**Business Fiber Internet**](https://www.atlantech.net/solutions/fiber) Premium fiber Internet to power productivity, delivered over Atlantech's own redundant fiber ring in the Washington, D.C. metro area. Speeds from 10 Mbps to 100 Gbps. Options include Dedicated Internet Access, Point-to-Point Circuits, Direct Cloud Connections, and MPLS and SD-WAN for multiple locations. Businesses can [check whether their building is fiber-ready](https://www.atlantech.net/solutions/fiber) before requesting a quote. Atlantech contrasts itself with Big Name Telecom on three points: you get the advertised speeds, you get fast and complete resolutions to problems, and you work with a local provider with a 30-year reputation rather than a big-business culture. Service areas are listed by city on the [locations page](https://www.atlantech.net/locations), covering Washington, D.C., Bethesda, Chevy Chase, Columbia, Gaithersburg, Germantown, Rockville, Silver Spring, Wheaton, Arlington, Alexandria, McLean, Reston, Vienna, Herndon, Chantilly, Falls Church, Ashburn, and Philadelphia. A long-form buyer's guide, [Business Internet Service: Everything You Need to Know](https://www.atlantech.net/business-internet-service), covers residential vs. commercial service, local vs. nationwide providers, fiber vs. cable vs. DSL, and how to choose the right connection. ### [**Microsoft Teams Calling**](https://www.atlantech.net/solutions/voice/microsoft-teams-calling) Enable Teams Calling for your Microsoft 365 environment so employees get full calling features in the platform they already use every day. Atlantech connects Microsoft Teams to its own voice switch, so even if Microsoft's service goes down, you can still make calls. What is included: * Unlimited local and long-distance calling. No measured plans, no unused minutes. * Direct Routing included, avoiding the equipment, personnel, and installation costs of setting it up yourself. * Enterprise dial plan, emergency 911 calling, call queues, call recording, attendant console receptionist software, automated disaster recovery, and call reporting. * White-glove setup and deployment, plus training for IT admins and employees. * In-house support and expertise. Atlantech's Microsoft Teams expertise is homegrown, not outsourced. Pricing starts at $10 per user per month. New customers get the first month free with no setup or porting fees. Implementation is a three-step process: verify the Microsoft license, migrate users to the Atlantech voice switch, then a managed cutover. Live in 30 days or less. ### [**Microsoft Teams Operator Connect**](https://www.atlantech.net/solutions/voice/operatorconnect) Atlantech is a Microsoft-certified Operator Connect partner. Operator Connect gives IT admins more control, faster adoption, and maximum ROI from the Microsoft 365 investment: self-manage users, numbers, call queues, and auto-attendants from the Teams Admin Center, with no SBCs to deploy or maintain and native provisioning inside Teams. What sets Atlantech's Operator Connect apart: * **5-minute setup** with wizard-driven onboarding and guided number porting. * **TLS 1.3 encryption across the network.** Voice signaling and media stay encrypted until the call exits to the PSTN, the same protocol trusted by financial and government systems. * **Direct Microsoft peering and 99.99% uptime.** Hosted in Microsoft Azure with a redundant backbone and DDoS protection, backed by Microsoft's 99.99% uptime guarantee. * **Call Manager, free for all customers.** Wizard-driven setup, role-based permissions, real-time call monitoring, and management of users, numbers, and reporting without entering the Teams Admin Center. Works with Operator Connect, Direct Routing, and GCC High. * **Compliance ready.** STIR/SHAKEN, E911, and GCC High for government and regulated industries. Ready for Microsoft Copilot and AI-driven voice analytics. Two pricing models. Flat-rate per user, as low as $3 per user per month, with unlimited U.S. calling, number porting, Call Manager, and 24/7 support included. Or a shared-channel model where organizations pay only for the PSTN capacity they use, ideal for 500+ user organizations, with typical savings of 30% to 50% versus flat-rate. A technical summary and a 30-day free trial are available on the page. Related reading: [Microsoft Operator Connect Explained](https://www.atlantech.net/blog/microsoft-operator-connect-explained), [Operator Connect vs. Direct Routing](https://www.atlantech.net/blog/operator-connect-microsoft-teams-vs-direct-routing), [A CFO's Breakdown of Operator Connect Pricing](https://www.atlantech.net/blog/cfo-guide-operator-connect-pricing), and [Top Operator Connect Partners in the USA](https://www.atlantech.net/blog/top-operator-connect-partners-usa). ### [**Microsoft Teams Calling for GCC High**](https://www.atlantech.net/solutions/voice/gcchigh) Secure and compliant Microsoft Teams PSTN calling and audio conferencing for government agencies and Department of Defense contractors operating in Microsoft 365 GCC High. Direct Routing is the only way to add Teams Phone to a GCC High environment, and only a select few carriers can offer it. Atlantech manages the PSTN calling services and Session Border Controllers, so customers save on hardware purchase and management. GCC High is Microsoft's specialized cloud environment for contractors holding or processing DoD controlled unclassified information (CUI) or subject to ITAR. Key features include U.S.-only data center locations, FedRAMP High accreditation, DFARS 7012 and NIST SP 800-171 compliance, CMMC 2.0 Levels 2-3 alignment, ITAR export controls, and PII protections up to IL4. What Atlantech's GCC High Teams Calling includes: * Compliant PSTN access and compliant audio conferencing for the GCC High tenant * Unlimited local and domestic calling; international billed only for what you use * Enterprise dial plan, dynamic 911 location routing, call queues, call reporting * White-glove setup, number porting, SBC configuration, and automated disaster recovery * Integrations with other M365 GCC High applications and professional services for user management * Go live in weeks, not months, with 24/7 support How it works in three steps: License Verification (a Microsoft Teams Admin confirms settings in Microsoft 365), GCC High Tenant Readiness (connect the Azure GCC High instance to the GCC High Direct Routing as a Service platform), then Start Making Calls with expert input from Atlantech's specialists. A government customer, quoted on the homepage: "Transitioning from Zoom for Government to Microsoft Teams in a GCC High environment was a critical move for our organization, driven by compliance, security, and integration needs. With a tight timeline and complex regulatory requirements, we knew we needed a partner who understood both the technical and federal landscape. Atlantech delivered exactly that." Joel T., Senior IT Manager, government agency. Deeper reading: [Microsoft Teams Phone & Audio Conferencing for GCC High](https://www.atlantech.net/microsoft-teams-phone-audio-conferencing) (an in-depth guide by Brant Zeigenfuss, PMP, Director of Networking, with Ed Fineran, President), [Best GCC High Voice Carriers (2026 Edition)](https://www.atlantech.net/blog/best-gcc-high-voice-providers), [GCC vs GCC High: Key Differences](https://www.atlantech.net/blog/gcc-vs-gcc-high-key-differences), [How Much Does Microsoft Teams Calling for GCC High Cost?](https://www.atlantech.net/blog/how-much-does-microsoft-teams-calling-for-gcc-high-cost), [GCC High Teams Calling Compliance: CMMC, ITAR, and DFARS](https://www.atlantech.net/blog/gcc-high-teams-calling-compliance), and [How to Set Up Teams Direct Routing in GCC High](https://www.atlantech.net/blog/teams-direct-routing-in-gcc-high). ### [**Business Phone Service**](https://www.atlantech.net/solutions/voice/phone) Flexible business phone services built to deliver consistent performance and crystal-clear call quality. Atlantech can serve anyone, anywhere, with service tailored to specific needs, multiple calling device options, a network engineered for call quality and uptime, and fast, friendly support. The page contrasts this with big-name cloud phone providers known for poor call quality, support that hurts more than it helps, and robot-based help chat. ### [**Unified Communications as a Service (UCaaS)**](https://www.atlantech.net/solutions/voice/unified-communications) Calling, meeting, and messaging in one place, from wherever you are. Delivering reliable cloud communications since 2004. Two tiers, Business Line and Premium Line, so organizations get what they need now and scale up as they grow. Capabilities cover calling features, mobility, conferencing, call analytics, and integrations, from the front desk and back office to work-from-home staff. Carl Whitman, CIO and VP of Instructional and Information Technology at Montgomery College: "With Atlantech Online's cloud-based communications solution we've been able to make a smooth transition from a legacy, premises-based PBX and establish a next-generation campus." ### [**Contact Center as a Service (CCaaS)**](https://www.atlantech.net/solutions/voice/atlantech-ccaas) A cloud contact center platform powered by Xima, built to serve customers better and hit key customer success metrics. Includes voice and web chat licenses, skills-based routing, queue callback, interactive voice response (IVR), real-time wallboards, supervisor control, historical reporting, and CRM integrations, delivered as a service so teams focus on the business, not contact center software. ### [**atlantech|text for Teams Calling**](https://www.atlantech.net/solutions/voice/atlantech-text) Send and receive SMS and MMS from your business phone number inside Microsoft Teams. Messages are protected by Microsoft authentication and can be downloaded or sent by email for filing. Only a select few carriers can offer texting in Microsoft Teams; Atlantech manages the infrastructure for you. ### [**atlantech|POTS, nationwide POTS line replacement**](https://www.atlantech.net/solutions/voice/pots-replacement) Copper phone lines are going away and ILECs are shutting down copper networks across the country. atlantech|POTS is an all-in-one replacement kit for fire alarm panels, elevators, fax machines, and other life-safety and business-critical systems, delivered over the Atlantech voice network without the cost and complexity of outdated copper lines. Purpose-built for property managers, businesses, and government. ### [**Zoom Cloud Phone**](https://www.atlantech.net/zoom-calling) A secure, cloud-based Zoom Phone solution for businesses of all sizes: cloud-based and scalable, device flexibility, full PSTN replacement, advanced call management, security and compliance, and integrated business tools. ### [**Compliant Call Recording**](https://www.atlantech.net/call-recording) Compliance-grade call recording that helps meet HIPAA, PCI-DSS, GDPR, and other regulations. Multi-platform recording, automated secure capture, AI-powered transcription and search, legal holds, flexible storage, and advanced audit trails and access controls. Built for finance, healthcare, legal, insurance, government, and customer support and sales teams. ### [**Data Center and Colocation Services**](https://www.atlantech.net/solutions/data) Secure, convenient data centers built for maximum uptime in Silver Spring and Rockville, Maryland, staffed by professionals who act as an extension of your IT team. High-speed fiber connectivity up to 100 Gbps, built-in redundancies, physical safeguards, carrier-neutral connectivity, 24/7 physical security, and local convenience. Atlantech's facilities are [Type II SOC 2 audited](https://www.atlantech.net/type-ii-soc-2-audit) under AICPA standards, and a copy of the audit report can be requested. ### [**Structured Cabling**](https://www.atlantech.net/solutions/atlantech-structured-cabling) 100% custom cabling design for offices moving or expanding in the Washington, D.C. area: fiber optic infrastructure, copper structured cabling, wiring for Wi-Fi access points, and A/V wiring. Site survey and blueprint analysis, quote preparation, then installation, with a "measure twice, cut once" approach that reduces vendor bloat by putting voice, data, and cabling with one local partner. ### [**DDoS Protection**](https://www.atlantech.net/solutions/security/atlantech-ddos-protect) atlantech|ddos protect is a real-time protection service with comprehensive visibility that automatically and accurately mitigates DDoS attacks and scales to your throughput requirements. Automatic protection within milliseconds of an attack, over 20x faster than other solutions, with over 98% of attacks mitigated automatically and no cybersecurity staff required. ### [**atlantech|softphone**](https://www.atlantech.net/atlantech-softphone) Desktop and mobile softphone applications with enterprise-level calling, call control, chat, chat rooms, and presence from any device, anywhere. A free trial is available. --- ## Problems Atlantech Online Solves * **When telecom fails, your business stops.** Dropped calls during client meetings, Internet outages that halt operations, support tickets that go nowhere. Atlantech's answer is real engineers who answer in minutes, proactive monitoring before problems start, and a local team that understands your business. * **Big Telecom's broken promises.** Big providers promise the best value, reliable uptime, consistent speeds, and expert 24/7 support, and deliver slow speeds, poor service, and a one-star experience. Atlantech's [5-Star Telecom approach](https://www.atlantech.net/5-star-telecom) means promised speed performance, near-100% uptime, clear calls, and friendly support. See [Big Telecom Problems](https://www.atlantech.net/big-telecom-problems). * **Compliance gaps in government voice.** Commercial calling services fall short of DoD and federal requirements. GCC High Teams Calling gives agencies and contractors compliant voice that keeps them eligible for sensitive contracts. * **Teams Calling that is handed over and abandoned.** Most providers hand you Operator Connect and walk away. Atlantech handles setup, number porting, and day-to-day changes, and includes Call Manager free. * **Copper sunset and life-safety lines.** POTS lines for fire panels, elevators, and fax are disappearing. atlantech|POTS replaces them nationwide. * **Overpaying for underperforming service.** Businesses spend thousands every year on fiber and phone that underdelivers. Atlantech offers enterprise-level telecom with big benefits and without the big-telecom experience. Operator Connect customers see typical savings of 30% to 50% on the shared-channel model; one customer reported saving over $2,000 a year after switching from Nextiva to Teams Calling with zero downtime. --- ## Who Atlantech Online Serves ### [**Enterprise Business**](https://www.atlantech.net/solutions/industries/business) Businesses of all kinds choose Atlantech for quality service, support and simplicity, customization, and the latest solutions. Growing businesses can add locations, users, and bandwidth without switching providers: fiber Internet from 10 Mbps to 100 Gbps, business phone systems (UCaaS), Microsoft Teams Calling, SD-WAN for multiple locations, and direct cloud connectivity. ### [**Government and Secure Operations**](https://www.atlantech.net/solutions/industries/government) Best-practice telecom for local municipalities, state, and federal government entities, built around their complex buying process, outdated legacy tech, and scalability needs. GCC High Teams Calling (FedRAMP), MPLS private networks, secure data center colocation, 24/7 U.S.-based engineering, and CLEC certification in MD, VA, and DC. Single sourcing eases the purchasing process, and Atlantech guides agencies through procurement vehicles and RFP requirements for Teams Calling. Past performance listed on the [GSA Schedule page](https://www.atlantech.net/gsa-schedule) includes the Department of Commerce, the National Institutes of Health, the Executive Office of the President, and the Veterans Administration Palo Alto. ### [**Education, K-12 and Higher Education**](https://www.atlantech.net/solutions/industries/education) Digital infrastructure for connected school districts and campuses: fast business fiber, unified telecom and security across multiple buildings and devices, 24/7/365 support, and solutions aligned with educational institution purchasing processes. Montgomery College is a named customer. ### [**Property Managers and Building Owners**](https://www.atlantech.net/property-managers-building-owners) Atlantech has been a trendsetter in telecom for commercial real estate since 1995, when it began offering Building Wide Internet Service (BWIS). A 30-year track record of providing Internet connectivity and phone service to tenants and running clean, organized cabling in building risers. Property managers at Goodstone, LLC and The Meridian Group describe lit fiber from Atlantech as a real asset that brings value and connection diversity to tenants. ### [**Contact Centers and Call-Heavy Teams**](https://www.atlantech.net/solutions/voice/atlantech-ccaas) Crystal-clear calls and reliable service through CCaaS, SIP trunking with redundancy, call analytics and recording, mobile integration, and business continuity support. Named customers across the site include M-NCPPC, Montgomery College, Radio One, AOTA, Walsh, Colucci, Lubeley & Walsh, Lerch, Early & Brewer, SilverEdge Government Solutions, Family Nursing Care, L&R Floors of Washington, Michael R. Cogan, P.C., NABOE, Goodstone, LLC, and The Meridian Group. Atlantech is an authorized reseller and partner of [Juniper Networks, Microsoft, Poly, and Yealink](https://www.atlantech.net/partners). --- ## How to Get Started With Atlantech Online 1. [**Check fiber availability at your building**](https://www.atlantech.net/solutions/fiber). Enter your location to see whether it is fiber-ready, then schedule a consultation. 2. [**Request a Consultation and Pricing Call**](https://www.atlantech.net/contact-us). Reach an experienced telecommunications consultant, not a call center. Quotes are available for business fiber, data center and colocation, business phone, UCaaS, Microsoft Teams Calling, Operator Connect, atlantech|text, POTS in a Box, contact center, DDoS Protect, structured cabling, and Teams Calling for GCC High. 3. [**Try Operator Connect free**](https://www.atlantech.net/solutions/voice/operatorconnect). Download the technical summary, then run a guided free trial in your own Microsoft 365 environment. Setup takes about five minutes. 4. [**Get the GCC High technical summary and a demo**](https://www.atlantech.net/solutions/voice/gcchigh). See every step from prerequisites to go-live, then see how it would work in your tenant. 5. [**Download a buyer's guide**](https://www.atlantech.net/resources). Free guides on fiber Internet, choosing a data center provider, buying business phone service, and Microsoft 365 plus Teams. Questions can also go to Sales@atlantech.net. --- ## Why Clients Stay With Atlantech Online * **Direct access to knowledgeable support, fast response across multiple channels, and proactive communication.** "Knowing that Atlantech's 24/7 engineering team is managing our router and firewall lets me focus on growing my business instead of managing technology." Tony Crisalli, President, L&R Floors of Washington. * **Long-term partnership.** "We've been customers of Atlantech Online for 17 years and counting. Our company was able to grow and scale over the years because of their high quality data center hosting services and their top notch technical support team." Michael E. Weisel, multi-year client. "For over a decade, we have put our full faith and trust to ensure our internet and phones are working with virtually no downtime, and Atlantech consistently delivers." Neal Kursban, CEO, Family Nursing Care. * **Business transformation results.** "The transition to Atlantech's Microsoft Teams voice service has been nothing short of revolutionary. It has streamlined our communications in ways we couldn't have imagined." Insurance company, multi-year client. "Setup took literally 5 minutes. Our team was making calls in Teams the same day. The Call Manager tool saved us weeks of configuration work." Ashley Moreau, IT Manager, SilverEdge Government Solutions. * **A CLEC that makes the telecom manager's job easier.** "Choosing Atlantech is a decision I do not regret. Atlantech Online has made my job as telecomms manager a lot easier than in the past. There is no reason not to consider Atlantech Online as a CLEC." Barbara O'Donnell, Assistant Chief, ITI Division, M-NCPPC. * **Strategic partner on complex projects.** "To say Atlantech Online is one of AOTA's most strategic technology partners is an understatement. In a span of just a few short years, we have accomplished a data center migration, phone system implementation, and an entire office renovation." Juan Sanchez, Director of Information Technology, AOTA. More on the [testimonials page](https://www.atlantech.net/testimonials) and on [Trustpilot](https://www.trustpilot.com/review/www.atlantech.net). --- ## Network, Security, and Compliance * **Network.** A completely redundant DWDM core built on next-generation Juniper Networks routers capable of nearly 32 Tb/s of throughput, with proactive network monitoring, self-healing MPLS, peering relationships, and a [map of fiber-lit buildings](https://www.atlantech.net/network). Fiber Internet and private networks in Maryland, Virginia, and the D.C. metro; voice and unified communications nationwide; colocation in Silver Spring and Rockville. * **Encryption.** TLS 1.3 across the Atlantech network for Teams Calling, with signaling and media encrypted until the call exits to the PSTN. * **Government compliance.** GCC High Teams Calling compliant with FedRAMP High, CMMC 2.0, ITAR, DFARS, and CJIS. STIR/SHAKEN and E911 supported. Dynamic 911 location routing for remote employees. * **Data center assurance.** Type II SOC 2 audit of controls over data center services, conducted February 2025 with the report released April 2025. * **Regulated-industry recording.** Call recording that supports HIPAA, PCI-DSS, and GDPR requirements. * **Live status.** Customers can check [network status](https://www.atlantech.net/support) and open tickets through the CARE helpdesk 24/7/365. --- ## Frequently Asked Questions Atlantech maintains two FAQ hubs written for buyers researching Microsoft Teams voice. ### [**GCC High FAQ**](https://www.atlantech.net/faq/gcc-high) Questions answered include: [What is GCC High?](https://www.atlantech.net/faq/gcc-high/what-is-microsoft-gcc-high), [GCC High vs. GCC: What's the difference?](https://www.atlantech.net/faq/gcc-high/gcc-high-vs-gcc-whats-the-difference), [What types of organizations are required to use GCC High?](https://www.atlantech.net/faq/gcc-high/what-types-of-organizations-are-required-to-use-gcc-high), [Does GCC High work with Teams Phone?](https://www.atlantech.net/faq/gcc-high/does-gcc-high-work-with-teams-phone), [Why is Direct Routing the only way to add PSTN calling to a GCC High tenant?](https://www.atlantech.net/faq/gcc-high/why-is-direct-routing-the-only-way-to-add-pstn-calling-to-a-gcc-high-tenant), [How much does GCC High Teams calling cost?](https://www.atlantech.net/faq/gcc-high/how-much-does-gcc-high-teams-calling-cost), [How long does it take to go live with GCC High Teams calling?](https://www.atlantech.net/faq/gcc-high/how-long-does-it-take-to-go-live-with-gcc-high-teams-calling), [What compliance frameworks does GCC High Teams calling cover?](https://www.atlantech.net/faq/gcc-high/what-compliance-frameworks-does-gcc-high-teams-calling-cover-cmmc-itar-dfars-fedramp), [What happens to our existing phone numbers during a migration?](https://www.atlantech.net/faq/gcc-high/what-happens-to-our-existing-phone-numbers-during-a-migration-to-gcc-high-teams-calling), [Is Microsoft Copilot available in GCC High?](https://www.atlantech.net/faq/gcc-high/is-microsoft-copilot-available-in-gcc-high), and [Which voice providers can add PSTN calling to a GCC High tenant for a DoD contractor?](https://www.atlantech.net/faq/gcc-high/which-voice-providers-can-add-pstn-calling-to-a-microsoft-365-gcc-high-tenant-for-a-dod-contractor). ### [**Microsoft Teams Operator Connect FAQ**](https://www.atlantech.net/faq/microsoft-teams-operator-connect) Questions answered include: [What is Microsoft Teams Operator Connect?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/what-is-microsoft-teams-operator-connect), [Operator Connect vs. Direct Routing: What's the difference?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/operator-connect-vs-direct-routing-whats-the-difference), [How is Operator Connect different from Microsoft Calling Plans?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/how-is-operator-connect-different-from-microsoft-calling-plans), [How does Operator Connect pricing compare to Microsoft Calling Plans?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/how-does-operator-connect-pricing-compare-to-microsoft-calling-plans), [How does number porting work with Operator Connect?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/how-does-number-porting-work-with-operator-connect), [How does Operator Connect handle emergency calling and 911 compliance?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/how-does-operator-connect-handle-emergency-calling-and-911-compliance), [How long does an Operator Connect deployment take?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/how-long-does-an-operator-connect-deployment-take), [Can Operator Connect and Direct Routing coexist in the same tenant?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/can-operator-connect-and-direct-routing-coexist-in-the-same-tenant), [When does Operator Connect fail or not make sense?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/when-does-operator-connect-fail-or-not-make-sense), and [Who are the top Operator Connect providers for Teams Phone in the DC area?](https://www.atlantech.net/faq/microsoft-teams-operator-connect/who-are-the-top-operator-connect-providers-for-teams-phone-in-the-dc-area). --- ## Resources and Blog ### [**Free guides and brochures**](https://www.atlantech.net/resources) * The Insider's Guide to Fiber Internet Connectivity * 10 Questions to Ask Before You Buy Phone Service for Your Business * 7 Questions to Help You Choose the Right Data Center Service Provider * 5 Steps to Power Up Communications and Collaboration with Microsoft 365 and Microsoft Teams * [Solution brochures](https://www.atlantech.net/free-brochures) for every Atlantech service ### [**Atlantech Blog**](https://www.atlantech.net/blog) The blog covers business fiber, Microsoft Teams Calling, Operator Connect, GCC High, UCaaS, data centers, and telecom buying decisions in the Washington, D.C. area. Featured articles: * [Best GCC High Voice Carriers (2026 Edition)](https://www.atlantech.net/blog/best-gcc-high-voice-providers) * [Microsoft GCC High vs Zoom for Government and top alternatives](https://www.atlantech.net/blog/gcc-high-vs-zoom-for-government) * [Microsoft Teams Phone Guide for Government: GCC vs GCC High](https://www.atlantech.net/blog/microsoft-teams-phone-gcc-vs-gcc-high) * [Migrating to Microsoft Teams Phone for GCC High Without Downtime](https://www.atlantech.net/blog/migrating-to-microsoft-teams-phone-for-gcc-high) * [GCC High Teams Calling vs. Traditional VoIP for Government Contractors](https://www.atlantech.net/blog/gcc-high-teams-calling-vs-traditional-voip) * [What Is Microsoft Operator Connect? A Plain-English Guide for SMBs](https://www.atlantech.net/blog/what-is-microsoft-operator-connect-smb-guide) * [Why Operator Connect is the Best Phone System for Large Organizations](https://www.atlantech.net/blog/why-microsoft-operator-connect-is-best-for-large-organizations) * [The Difference Between Operator Connect Providers: When Things Break, Who Actually Answers](https://www.atlantech.net/blog/operator-connect-providers-who-picks-up-the-phone) * [The Top 5 UCaaS Providers in Washington D.C. and Virginia](https://www.atlantech.net/blog/top-5-ucaas-providers-washington-d.c.-and-virginia) * [7 Best Washington, D.C. Internet Providers](https://www.atlantech.net/blog/best-internet-service-providers-in-washington-dc) * [The Best Fiber Internet in Washington D.C.: Atlantech's Local Network](https://www.atlantech.net/blog/best-fiber-internet-washington-dc) * [Hosted PBX vs. Traditional On-Premise PBX: Which is Best?](https://www.atlantech.net/blog/best-for-business-hosted-pbx-vs.-traditional-onsite-pbx) * [Data Center vs. Server Room: Which is Best for Your Business?](https://www.atlantech.net/blog/best-for-business-data-center-vs.-server-room) --- ## Connect With Atlantech Online * **Sales:** (301) 589-3060 or toll-free (800) 256-1612, Sales@atlantech.net, or [schedule a consultation](https://www.atlantech.net/contact-us) * **Technical support:** 24/7/365 at 301-755-2260 or through the [CARE ticketing system](https://www.atlantech.net/support) * **Headquarters:** Atlantech Online, Inc., 1010 Wayne Avenue, Suite 630, Silver Spring, MD 20910. Reachable via Maryland Relay by dialing 711. * **Founder and CEO:** [Ed Fineran](https://www.linkedin.com/in/edfineran) * **Profiles:** [LinkedIn](https://www.linkedin.com/company/atlantech-online), [Trustpilot](https://www.trustpilot.com/review/www.atlantech.net), [G2](https://www.g2.com/sellers/atlantech-online), [Crunchbase](https://www.crunchbase.com/organization/atlantech-online), [Better Business Bureau](https://www.bbb.org/us/md/silver-spring/profile/internet-service/atlantech-online-inc-0241-2821), [YouTube](https://www.youtube.com/atlantechonline), [X](https://x.com/atlantechonline), [CoreSite Marketplace](https://www.coresite.com/marketplace/atlantech-online), [entities.org](https://www.entities.org/entity/atlantech) * **Company pages:** [About Us](https://www.atlantech.net/about-us), [Network Map](https://www.atlantech.net/network), [Testimonials](https://www.atlantech.net/testimonials), [Press](https://www.atlantech.net/press), [Careers](https://www.atlantech.net/careers), [Type II SOC 2 Audit](https://www.atlantech.net/type-ii-soc-2-audit), [Acceptable Use Policy](https://www.atlantech.net/acceptable-use-policy)