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Transparent LAN Service (TLS)

Why Verizon?

Gain a competitive edge with Ethernet Transparent LAN Service (TLS), our Switched Ethernet service. Verizon offers two types of TLS service; MEF certified E-Line point-to-point service we call Ethernet Relay Service (ERS) and E-LAN any-to-any service we call Ethernet Multipoint Service (EMS) for intraLATA access applications. TLS allows the seamless convergence of voice and data so your customers receive a single network solution controlled by you. You get scalable bandwidth, Class of Service (CoS) capabilities and a very large service footprint from a single provider all with Ethernet's "plug and play" flexibility.

" Verizon is a recognized industry leader in Ethernet solutions, offering a multi-award winning Switched Ethernet product we call TLS"

Product Manager - Brendan Gunn

View the Verizon Partner Solutions webcast for more information on TLS. Choose "Section 2" from the list of available webcasts.

Lower the Cost of Connecting Multiple Sites

Transparent LAN Service (TLS, aka Switched Ethernet Services) gives you the opportunity to offer your customers lower costs for data communications at native Ethernet speeds between sites within many Verizon metropolitan service areas. TLS is available in two service types: Ethernet Multipoint Service (EMS) (aka E-LAN) and Ethernet Relay Service (ERS) (aka E-Line) with multiple Class of Service options.

TLS is an all fiber-based, metropolitan area LAN interconnecting service.

TLS connects customer locations together at native LAN speeds and Ethernet interfaces of 10 Mbps, 100 Mbps, 1 Gbps and/or 10 Gbps (10 Gbps available for ERS-Premier only) Ethernet.

LANs are extended over dedicated fiber loops, to Central Office based Ethernet switches. These connections are called User to Network Interconnections (UNIs) and provide connectivity to any other UNI in that LATA through an Ethernet Virtual Connection (EVC) within Verizon’s TLS cloud. Each EVC uses a port-based Virtual Local Area Networks (VLAN), so each end customer only sees a "private" network or closed user group, and therefore cannot communicate with other customer groups (referred to as domains).

Conceptual Diagram:


  • Cost effective service for implementing Wide Area Network (WAN) or Metropolitan Area Network (MAN)
  • Verizon's unmatched fiber footprint within service areas simplifies connecting widely separated customer locations
  • Offers greater scalability than Frame Relay, ATM or private line services because the service can be updated in granular bandwidth increments from 1 Mbps up to a full gigabit.
  • Full range of port options: 10Mbps, 100Mbps, 1Gbps, 10Gbps
  • Flexibility through this services' innate ability to support any number of sites and configurations
  • Native Ethernet handoff (no protocol conversion required)
  • VLAN assignments per customer provides high security while taking advantage of costs savings of a shared network
  • CoS choices allow you to prioritize traffic for voice and data applications
  • SLAs provide confidence that Verizon network will meet key requirements
  • 24 x 7 network monitoring to maintain high reliability and customer satisfaction

Service Types

  • Ethernet Multipoint Service (EMS aka E-LAN) provides fully meshed, any-to-any connectivity, making it ideal for LAN to LAN networking. It is configured by connecting UNIs with one multipoint to multipoint EVC or VLAN and provides full port speed with two Class of Service options - standard and real time.
    • Ideal for Multipoint-to-Multipoint applications such as intra-company voice and LAN to LAN data
    • Offers simple, connectionless and any to any connectivity
    • Transparent to customer VLANs and Layer 2 control protocols
    • Available with Class of Service Option to support packet voice applications over the multipoint to multipoint service
  • Ethernet Relay Service (ERS aka EVPL) utilizes point-to-point and multipoint-to-multipoint Ethernet Virtual Connections (EVC) to define site to site or site to multiple site connections. ERS can support multiple EVC's enabling a hub and spoke configuration as well as the interconnection of multiple sites, in conjunction with a wide variety of EVC bandwidth options that enables incremental bandwidth scaling to meet your customers growing network requirements.
    • Point-to-Point, EVCs copuled with the ability to mix with multipoint-to-multipoint EVCs offer greater flexibility
    • One or more EVCs may be allowed per UNI depending on the UNI service configuration
    • Ideal for voice, video and real time data

User to Network (UNI) / Network to Network (NNI) Interfaces:

  • TLS UNI Port with Access Line: Available as 10Mbps, 100Mbps, 1Gbps, or 10Gps (10Gbps available for ERS-Premier only).
  • E-NNI Port-Only: Available as 1Gbps or 10Gps.
  • E-NNI port with Access Line Available as 1Gbps or 10Gbps.

Ethernet Virtual Connections (EVC)

Applicable to ERS service model. EVCs are offered in 1 Mbps increments from 1-10 Mbps, 10 Mbps increments from 10-100 Mbps, and 100 Mbps increments from 100-1000 Mbps. ERS supports three Class of Service options - Basic, Priority Data and Real Time.

  • Real Time: designed for packet voice, video and other applications requiring tight performance for frame delay, frame jitter and frame delivery performance.
  • Priority Data: designed for data applications requiring frame delivery performance.
  • Basic: designed for data applications that do not require performance and where cost per Mbps is the key requirement.

Other Functionality/Features

  • Tunnel Access Service: allows ERS customers to preserve their VLAN tag (both the VLAN ID and the priority) across the TLS network.
  • Ping the Network Interface Device (NID): network testing feature for TLS that allows Customers to provide an IP address and subnet mask that will be configured on Verizon's NID at an end user location.
  • VLAN Translation: provides customers with the power to specify their own unique Ethernet Virtual Circuit (EVC) Virtual Local Area Network (VLAN) ID. (Alternately, customers can choose to use a Verizon-issued VLAN ID). This enhancement provides greater flexibility as it will allow customers to pre-configure their premise equipment even before an EVC is ordered/provisioned and avoid potential VLAN conflicts.
  • Protected UNI Port with Access Line: Customers can choose to have their 10Mb, 100Mb, or 1Gb User to Network interface (UNI) provisioned over a diverse or non-diverse Synchronous Optical Network (SONET) system. Customers thereby receive the power and flexibility of Verizon's TLS service combined with the redundancy and survivability of a SONET infrastructure.


Verizon grandfathered Ethernet Transparent LAN Service (Ethernet TLS) in its FCC Tariff Nos. 1 and 20 (Tariffs) effective as of March 30, 2007 as a result of the forbearance Verizon received from certain common carrier regulation for several packet-switched broadband services, as well as non-TDM-based optical networking, optical hubbing, and optical transmission services (Forbearance). In accordance with this Forbearance relief, Verizon now offers a service comparable to Ethernet TLS under a private carriage arrangement.

If you wish to place any new orders for Ethernet TLS, you will need to enter into a private carriage arrangement with Verizon for a comparable service. Subject to certain terms and conditions, you may make certain changes to your existing Ethernet TLS under the Tariffs. For a full description of all permitted changes, if any, please refer to the Tariffs. Please note that there are several rate elements, such as Ethernet Virtual Circuits (EVCs) and Interoffice Mileage that are available on a month-to-month term only.

Learn more about Forbearance or contact your Account Manager for details.

TLS is available in more than 30 LATAs throughout Verizon's ILEC footprint as shown here:


Pricing for TLS is handled on a private carriage contractual basis. Please contact us or call your account manager to discuss your particular needs. Be sure to ask them about our pricing promotions which include:

  • TLS YES! - Offering 30% discounts* in select locations
  • TLS JOLT – Volume discounts* up to 20% based on unit commitments
  • From time to time there may be other promotions available. Please contact your account manager for details.

* All discounts are off of standard rates

Note: Certain services described above are provided on a private carriage basis (Private Carriage Services), while the terms and conditions of certain other services described above are set forth in full detail in Verizon’s FCC Tariffs (Tariffed Services). For all Private Carriage Services, the above summary is provided for your information and reference only. However, the actual terms, conditions, restrictions, limitations and the like for Private Carriage Services will be those set forth in the agreement between the customer and Verizon for such Private Carriage Service and shall govern over any inconsistent provisions set forth herein. For all Tariffed Services, any summary of Verizon’s FCC Tariffs (Tariffs) set forth above is being provided for your convenience, but is not intended to provide a complete description of the terms and conditions of the Tariffs. You should not rely on this summary, and should conduct your own review and analysis of the Tariffs. Any failure or error by Verizon to fully or accurately set forth all relevant terms and conditions of the Tariffs shall not be deemed to bar Verizon from exercising its rights under the Tariffs. Notwithstanding anything to the contrary herein, the Tariffs shall govern over any inconsistent provision set forth herein. All services are not available in all areas, and are subject to availability of facilities and equipment.

Related Solutions Verizon Optical Networking

Related Information Tariffs Industry Letters