Leased Lines

The Leased Lines service provides a permanent, transparent, dedicated point–to-point connectivity between two customer's points, using Romtelecom's transport network.

Benefits:

Romtelecom's Leased Lines ranks as premium service, offering:

• Reliability: the Leased Lines service provides a reliable connection, for a fixed monthly fee, throughout the entire contract period;
• High security: as the Leased Lines service provides a dedicated line, exclusively designed for each customer, the service is the best choice for long-term connections, requiring a fast and efficient communication channel between two fixed locations;
• Permanent accessibility: the Leased Lines service offers a permanent connection for data delivering at maximum capacity;
• Multiple options: a large variety of services type is available depending on speed, volume and type of data delivered; with a high granularity level for transmission speeds, the service is suitable for all applications types;
• Budget control: the required budget for the Leased Lines service is easily predictable.

The Leased Lines service provides a secure and private communication between two end points. A leased line may be used on a continuous basis to transmit large amounts of data at the maximum rate allowed by the line.

Depending on the leased line end points location, two types of service instance are available:

• National Leased Lines – point-to-point connectivity between two locations, within Romania, on customer site;
• International Leased Lines – point-to-point connectivity between two locations, at least on located in Romania. The international service provisioning is based on the cooperative use of a shared infrastructure, where one part of the service is delivered by Romtelecom and the second one is delivered abroad through an interconnection agreement.

To transport leased line traffic, different technology can be used within the Romtelecom network: PDH/SDH/DWDM.

Depending on the transport and access technology, the following bandwidths are available:

Bandwidth[Mbps]	Transport Delivery Technology					Access Technology
	Digital					Copper	FO
	NewBridge	PDH	SDH	SDHoDWDM	DWDM	HDSL	Transport over FO
0.256		-	-	-	-		-
0.512		-	-	-	-		-
1		-	-	-	-		-
2	-			-	-		-
34	-			-	-	-
155	-	-			-	-
622	-	-				-
2,500	-	-				-
10,000	-	-				-

The back-up solutions available for Leased Lines services are:

• Back-up in the access network – the second circuit for the customer;
• Port protection at entrance in the SDH/DWDM transport network;
• Path protection on transport technology

The Leased Lines service provisioning involves the following components:

• CPE: including provisioning, configuration and management is not included in the basic offer, yet available upon request;
• Interfaces;
• Access line: a dedicated, permanent point-to-point physical connection, which connects the NTU/CPE from the leased line end-point to the Romtelecom network element, part of the transport network. Based on transfer rate and transport technology, the access line uses copper cable or fiber optic, as physical medium;
• Transport network: the DWDM, SDH and PDH technologies are used within the Romtelecom transport network, in order to provide the Leased Lines service. The media used for implementations is optical fibre
• NNI (Network-to-Network Interface) – only for international service: a physical interconnection between Romtelecom and partner operator's network realised in an abroad collocation centre
  

  

  NNI interconnection

The technical architecture depends on the service type: