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Who can use the service?
The Bitstream NGA service is addressed to all the licensed OAOs wishing to offer ultra-broadband services to their end customers through the New Generation Network of TIM without having to deploy their own access networks. The services provide all the technical and operational elements to allow OAOs to connect their own backbones to TIM ultra-broadband access network. The Bitstream NGA offer can provide ultra-broadband services that can fit the specific technical and commercial needs of any OAO.
Description of the service
The Bitstream NGA service consists in the provisioning of end users’ access lines traffic and bandwidth from/to the end user’s site to/from its OAO’s backbone by means of connection to the layer 2 TIM network (namely OPM, Optical Packet Metro).
The Bitstream NGA reference network architecture is shown in Figure 1 (where FTTx stands for “FTTCab or FTTE”), and its supply chain is made of the following main elements: delivery, backhaul, access.
Traffic delivery to the OAO can be done through different kinds of connection to TIM network. Anyway, it always requires the use of a proper dedicated switch device for any OAO (though Telecom Italia also offers the possibility to share switch devices among different OAO), that must be connected to specific nodes of the TIM network that are designed for this purpose (namely “Punti di Interconnessione”). The delivery switches work as “edge” devices, meaning that they are used to make Telecom Italia and the OAOs networks mutually independent.
The available kinds of connection to Telecom Italia network are:
When either the connection to Parent Node or the connection to Distant node is adopted, Telecom Italia offers the possibility to deliver both the Bitstream NGA and the Bitstream Ethernet on the same delivery kit, provided that the proper conditions are verified to do so.
The backhaul component is the traffic delivery to/from the end customer access line from/to the OAO network. Different models are available for traffic aggregation, together with different Classes of Service (CoS).
For traffic aggregation, the following models are available:
The following CoS models are available:
The OAOs can request bandwidth changes at any time, that will be provided without interrupting the service.
The access portion is the link between the end customer and its associated TIM exchange node (where the OLT is located), and varies according to the access technology on the customer side:
FTTCab/FTTE (VDSL2): Like ADSL lines, the end customer has a local loop through which it can use both the PSTN service (that may also be offered through the Wholesale WLR service) and data connectivity service, the latter in VDSL2 technology (Very High Speed DSL 2) or EVDSL (Enhanced VDSL). Data connectivity service requires the customer to have a VDSL2 /EVDSL modem (not included with service provisioning). The customer local loop may be terminated either on a street cabinet or in a local exchange: in both cases, it is connected to an ONU (Optical Network Unit) that may be either installed on top of a street cabinet (in which case the FTTCab VDSL2/EVDSL technology is adopted) or in a local exchange (in which case the FTTE VDSL2 technology is adopted). The PSTN component is provided through cabinet splitters (that split the baseband voice channel (where active), which is terminated on the TIM phone exchange, from the ultra-broadband data channel) in the former case and from the local exchange in the latter case. ONUs in turn are connected through fiber links to their associated OLTs (Optical Line Termination), that are located in Telecom Italia exchange nodes and that terminate the ultra-broadband channels.
VDSL2 /EVDSL access lines can be requested both in “shared mode”, i.e. sharing with the PSTN/WLR service (but NOT with the ISDN service, which requires an additional dedicated line) and in “naked” mode, i.e. without any PSTN service associated.
The following Figure 2 shows the FTTCab VDSL2/EVDSL access architecture.
The demarcation point between TIM and the OAO is the network termination located at the end customer’s site, where the VDSL2/EVDSL modem is connected.
FTTH: The end customer has a fiber in its home/office. When the access line is activated, TIM will bring and install an OTO (Optical Telecommunications Outlet) and an ONT (Optical Network Termination) in the customer’s site. The Customer Premise Equipment (CPE) that will be connected to the ONT is not included with the service provisioning. The fiber in the customer’s living environment is terminated on an OLT located in the Telecom Italia exchange node, according to GPON network architecture.
FTTH access lines can be requested only in “naked” mode, i.e. without a PSTN component.
The following Figure 3 shows the FTTH access architecture.
Several asymmetic profiles are available for VDSL2/EVDSL2 and FTTH accesses, with the downstream maximum speed greater than the upstream maximum speed.
Moreover, up to 4 User VLANs can be associated to any access line: they can be either single-CoS or multi-CoS VLANs, but it is requested that they fit the transport traffic model the access line has been associated to.
Information on geographical coverage is updated every week (Italian version only "Coperture").
Any OAO needing to co-locate its equipment at the Telecom Italia facilities, for example to set up connections for the Bitstream NGA service, must first apply to TIM for the Co-location service. Any OAO wishing Wholesale TIM to provide connections from a Wholesale TIM exchange node to the OAO exchange node (it usually happens when the OAO facilities are not co-located) must first subscribe to the Interconnect Flow offer.
The Bitstream NGA service have a pricing structure that can make OAO costs flexible. The pricing structure is based on the following key elements:
Basing on the characterization of the above 3 elements, OAOs can customize their ultra-broadband connectivity offers for their end customers
For more technical-sales information on this service, please contact your Account Manager.
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The offer is intended for Operators holding individual licences or general permits for telecommunications networks and services offered to the public, already in existence when Italian Legislative Decree no. 259 of 1 August 2003, setting out the "Electronic Communications Code", came into force (pursuant to Art. 38 of the Code), as last amended by Legislative Decree No. 70 of 28 May 2012, as well as companies holding general permits for electronic communication networks and services, pursuant to Legislative Decree no. 259 of 1 August 2003, as last amended by Legislative Decree no. 70 of 28 May 2012.
The Bitstream NGA offer is revised at least once a year, depending on the technologic progresses, market demand and changes in the regulation. Any revision is subject to approval by AGCom (the Italian Authority for Communications).