Data Services


NOS has a fully convergent and integrated network, supported in its own optical backbone network, with national coverage, serving transparently its access networks.

The NOS Network is made up of:

  • Access network with countrywide coverage;
  • Transport and distribution network of the highest quality and fully based on fiber optics;
  • Network “core”, made up of high capacity redundant commutation junctions;
  • Service platforms, from which a number of services are provided, namely voice, data, internet and intelligent network services.
We are able to offer you solutions based on:
  • OPTICAL FIBRE ACCESS NETWORK - Synonymous with the latest communications generation, enabling to implement solutions with dedicated connectivity and high capacity.
  • COPPER ACCESS NETWORK - Ensures the best fixed communications network with more than 198 direct access central offices. Primal purpose: provide full national territory coverage.
  • MICRO WAVE ACCESS NETWORK - It is based on radio links in exclusive and dedicated NOS wave bands in order to ensure redundancy in high-speed connectivity solutions.
  • SATELLITE ACCESS NETWORK - Provides IP connections anywhere in the territory, with quick and easy setup and without the need for terrestrial infrastructure.
  • LTE / 4G ACCESS NETWORK - Provides national higher bandwidth for real-time access, fixed and mobile solutions.
  • UMTS / 3G / 4G ACCESS NETWORK - Ensures high bandwidths for mobile data communications, an unavoidable necessity in everyday business.
  • GSM / 2G ACCESS NETWORK - Allows to be reached, with full mobility throughout the country.

Backbone & Backhaul


  • National backbone - Over 6.000 km of national backbone cossing all the main cities in Portugal, with extensive MANs that connect relevant points.
  • International backbone - City-to-city (within Europe with special emphasis on Lisbon-Madrid). NOS is the reference provider for the Lisbon Madrid route
  • BACKHAUL - Submarine Cables (Sesimbra and Carcavelos Landing Stations) Africa:SAT3, Middle East and Asia: SMW3, Americas: Atlantis 2 & Columbus-3. Optimus provides the interconnection to reach your submarine capacity through facilities connecting to Cable Stations. The available capacities are: E1, E3, DS3, STM1, STM4, STM16 and STM64/10GbE.

  • IP Transit (including circuits to Carrier PoP & IP addresses)
NOS IP Transit delivers a dedicated and permanent access to the Internet through Lisbon/Madrid/London/Amsterdam. Uncontended Tier 1 access that´s backed up by quality support and demanding SLA´s.



  • Lambdas/DWDM

Carrier Ethernet Services:

  • Fiber
  • SDH
  • EFM (Ethernet First Mile)

Carrier Ethernet is the preferred high-bandwidth Ethernet technology for internetworking and Internet access.

Ethernet, currently is and will be the most successful technology and widely adopted as the low cost high availability transport solution for the future.



  • Offer

Providing a full range of Ethernet services incorporating all variants defined by industry (E-Line, E-LAN) complying with international standards in place at every moment; Coverage Largest possible coverage of national territory in order to allow the greatest possible extent to address customers eligible for the sale of services;

  • Flexibility and Scalability

Possibility of adding multiple access technologies to allow a tailored made offer to the needs of each customer, allowing the migration, growth and the reshaping of the number of the installed access solutions, bandwidth and network topologies through simplified and non-disruptive procedures;

  • Quality

Routing capacity of various types of traffic with differentiation of service classes, supporting data, Internet, Voice and Video, and ensuring communications complying with high standards of performance and availability;



  • Management

High levels of effectiveness and efficiency in service operation (provisioning, troubleshooting, service replacement time) and the ability to real-time monitoring of the defined service levels.

  • Ethernet over Fiber

Direct Connection to the node of the NDDD Carrier Ethernet access network, which is closer to the customer.

Main advantages:
Higher Performance;
More flexibility;
Typically lower cost than SDH technology.



  • Ethernet over SDH

Connecting the NDD and the carrier Ethernet aggregation network over a SDH dedicated access circuit.

Main advantages:
High speed access for long distances without any signal regeneration;
Ideal for extremely high availability connections.




  • Ethernet First Mile

EFM Accesses allow connection of the customer premises to NOS central with carrier Ethernet up to 10 Mbps based on copper.



  • TDM (SDH)

Synchronous Digital Hierarchy (SDH) is a standard technology for synchronous data transmission on copper and optical media. This technology is mostly used for high availability connections or long distances locations.

  • Net ADSL

Net ADSL is a complete solution, providing a permanent connection between the NOS IP broadband networks and his company, using ADSL/ADSL2 + access technology, through its own infrastructure (direct access) or through regulated incumbent offers (indirect access).
Broadband data transmissions up to 24 Mbps (downstream) 1Mbps (upstream).

High-speed interconnections from NOS PoP to IP Backbone and from IP backbone to other national & international Networks guarantee high performance for each connection.

Through more than 200 Points of Presence (PoP) across the country, and covering 1.7 million homes, NOS Direct Access Network covers more than 60% of active loops with their own infrastructure, providing products and Internet solutions with unique characteristics in the market.

Multiple access speeds available - Allows access to the Internet through a wide range of service classes;
Guaranteed performance (direct access) - Direct and exclusive connection to NOS Network / IP Backbone without constraints or contention rates;
Fixed monthly Fee - Monthly fee regardless of time usage or information volume (unlimited traffic).

Supervision 24 hours a day, 7 days a week of the your Company’s dedicated circuit through NOS IP Network Management and Operation Center;
Dedicated technical support team, Technical Support is available 24 hours a day 7 days a week by No. 808 101 090;

  • NET xDSL

Net xDSL symmetric is a complete solution, providing a permanent connection between the NOS IP broadband networks and his company, using xDSL/ADSL2 +/Annex.M access technology, through its own infrastructure (direct access) or through regulated incumbent offers (indirect access).

High-speed interconnections from NOS PoP to IP Backbone and from IP backbone to other national & international Networks guarantee high performance for each connection.

Allows symmetric access to the Internet through broadband connections of 1Mbps or 2Mbps.

Through more than 200 Points of Presence (PoP) across the country, and covering 1.7 million homes, NOS Direct Access Network covers more than 60% of active loops with their own infrastructure, providing products and Internet solutions with unique characteristics in the market.

Multiple access speeds available - Allows symmetric access to the Internet through broadband connections of 1Mbps or 2Mbps;
Guaranteed performance - In both access modes, direct and indirect connections to the Internet are supported in NOS network infrastructure, permanently designed according to engineering rules established to ensure the absence of any constraints at network levels;
Fixed monthly Fee - Monthly fee regardless of time usage or information volume (unlimited traffic).

Fixed IP Interconnection- In order to enable the delivery of content and applications over the Internet.

Supervision 24 hours a day, 7 days a week of the your Company’s dedicated circuit through NOS IP Network Management and Operation Center;
Possibility to assign an optional fixed IP address or a range of six fixed IP addresses per connection for connecting servers to the Internet;
Dedicated technical support team, Technical Support is available 24 hours a day 7 days a week.

  • NET Link Dedicated Circuit

The Net link Service is a complete solution for Internet communications, providing a direct link between NOS IP Exclusive broadband network and a customer through a dedicated copper circuit, radio access or fiber optics access.

Multiple access speeds available - Allows access to the Internet via diverse range of access speeds from 64 Kbps to 10Gbps;
High quality - Ensures higher levels of service availability which are continuously monitored;
Guaranteed performance - Direct and exclusive connection to NOS IP network;
Fixed monthly Fee - Monthly fee regardless of time usage or information volume.

Supervision 24 hours a day, 7 days a week of the your Company’s dedicated circuit through NOS IP Network Management and Operation Center;
Providing daily, weekly, monthly and annual dedicated internet access traffic monitoring graphs through your company's client area;
Dedicated technical support team, Technical Support is available 24 hours a day 7 days a week.

The MPLS (Multi-Protocol Label Switching) ensures that the traffic from an individual VPN is isolated from other individual VPNs, through the use of a tag label switching mechanism placed in IP packets, providing complete privacy and network security just as in other high technologies commonly referred to as Level 2 (eg Frame Relay).

In locations where means of access to VPN IP is supported on ADSL or 3/4G technology, the proposed Solution advocates the use of additional encapsulation and encryption mechanisms.

These will ensure the authentication mechanisms when establishing a communications session between each remote site and NOS point of access and also the encryption of data transmitted during the same sessions.

Combining the flexibility of IP-based services with security features, performance and quality of service typically provided by other technologies such as Frame Relay or dedicated circuits, IP MPLS VPN service allows companies to set up private communications networks capable of voice, video, data and internet integration dimensioned at the customer’s request and built upon a quality of service and security environment;

Communications effective Cost Control
Monthly fee regardless of time usage or information volume.

Sharing information in real time
Ability to maintain permanently updated information and establishes communications with media content between remote offices;

Differential traffic management
The private network understands your company's business, ensuring and distinguishing dynamically the routing of prioritized traffic generated by the most critical applications to your business;

Ease of response to business growth and changing needs
Ability to expand capacity of the Company’s communications network, minimizing the impact on your company normal operation;

Voice and Video integration
Your company can have voice and video communications between their offices using the same infrastructure;

Offer Solutions
Your company can subscribe the VPN IP MPLS service including the provisioning and management of access equipment;

NOS also provides converged data services across Portugal, with not only the best coverage provided by any operator, but also with competitive prices and SLA´s. Among NOS offer, you can count on us to provide the best service available in Portugal.