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BSS/OSS Academy
Domain Examples/Broadband Internet (FTTH) — Off-net

Broadband Internet (FTTH) — Off-net

How a retail operator sells FTTH Home Internet 1 Gbit/s at an address its own fibre does not reach: serviceability finds the other licensed operator (OLO) that does, SOM decomposes the same retail product to a partner-access path, the retail ROM reserves its own side of the NNI — customer VLAN, BNG subscriber, IP address — and a wholesale product order goes to the OLO, which allocates and activates its own fibre, splitter, OLT and ONT and returns only a line ID.

Architecture Overview

BSS — Commercialwhat can be sold — one product, on- or off-netSOM — Service Order Managementchooses the path (off-net here) and orchestrates both sides — never touches a deviceROM — retail side of the NNIC-VLAN, BNG, IP — reserved, then allocatedRetail network mgmtexecutes, does not chooseOLO — access providerallocates its own resources — opaque to retailCOM captures the product order — the same retail product as on-net. No resources, and no OLO, are named.Customer orderCOM · ORD-22871One product and one CFS for on-net and off-net. The decomposition differs, chosen per order from serviceability — never a second "via OLO" product.Product Catalogone product · two pathsCFS → Partner Access (the OLO’s wholesale product), Handover (C-VLAN on the NNI) and IP Access (BNG, IP, AAA).Service decompositionoff-net: partner-access pathSequences both sides: the retail ROM’s reservation and activation, and the wholesale order to the OLO. Configures nothing itself.Service orchestrationretail ROM + OLO orderRecords the service instances once both sides are confirmed.Service inventoryCFS / RFS instancesThe retail inventory: its own C-VLANs, BNG subscribers and IP addresses — and the OLO access line as an external reference, never the OLO’s ports.Resource inv.own + OLO line IDCommits C-VLAN 1437, a BNG-02 subscriber and an IP address to the order before anything is configured.ReservationC-VLAN · BNG · IPTurns the reserved retail resources into a provisioning request for BNG management and AAA.Fulfilmentprovisioning requestConfigures the BNG-02 subscriber on C-VLAN 1437 and writes the FTTH-1G profile to AAA / RADIUS.BNG mgmt + AAAsubscriber · RADIUSCompares retail inventory with BNG-02, and with the OLO’s wholesale bill. Access faults go to the OLO against its line ID.Assurancereconcile ×2The OLO’s serviceability and ordering APIs (TMF645 / TMF679 / TMF622, or MEF LSO Sonata). Product orders in, status and the line ID out.B2B APIservice­ability · orderThe OLO’s own orchestration and inventory allocate its drop fibre, splitter port, OLT PON port and ONT. The retail operator never sees them.OLO SOM / ROM+ OLO inventoryConfigures the OLO’s ONT, OLT and access aggregation, up to the NNI.OLO NMS / EMSONT · OLT · aggCustomer premisesOLO access network (PON)OLO aggregationRetail IP edge / coreInternet / externalowned and operated by the OLOowned and operated by the retail operatordrop fibrePONThe customer’s home router — the retail operator’s CPE.Retail routerThe ONT — in the home, but the OLO’s: allocated in its inventory and configured by its OLT.ONT (OLO)The OLO’s passive splitter. Which port serves this customer is the OLO’s to allocate — the retail operator never knows.Splitterport: OLO’sThe OLO’s OLT. The PON port serving this customer is allocated in the OLO’s inventory, not the retail operator’s.OLT (OLO)PON port: OLO’sThe OLO’s access aggregation — carries the customer to the NNI on C-VLAN 1437, the value the retail operator put in the order.Aggregationto the NNINNI-OSL-02 — the network-to-network interface between the two operators, built once and shared. Per order only the customer VLAN on it is allocated: C-VLAN 1437 under S-VLAN 2010, by the retail ROM.NNIhandoverC-VLAN 1437BNG-02 — the retail operator’s: subscriber on C-VLAN 1437, IP 10.20.40.17, 1 Gbit/s / 100 Mbit/s policy.BNG-02IP 10.20.40.17AAA / RADIUS — authenticates the customer’s router and returns the FTTH-1G profile.AAA / RADIUSInternetcontent · OTT
Retail inventoryC-VLAN 1437 · NNI-OSL-02BNG-02 subscriberIP 10.20.40.17OLO access line

Press Simulate an activation to watch order ORD-22871 go live over another operator’s fibre: the systems light up as they act, a pulse follows each message, and the strip follows the retail operator’s own C-VLAN, BNG subscriber and IP address from AVAILABLE through RESERVED to IN SERVICE — and the OLO line from PENDING to its line ID. Tick Simulate a failed activation to see the OLO reject the order and the retail side released.

The active wholesale (bitstream) model. Other wholesale models move the line: in passive access (PON or dark fibre) the retail operator owns the OLT; with layer-3 bitstream the BNG / IP handoff sits on the OLO side. For the demo the installation appointment is assumed already booked, and the fault interface to the OLO and the router logistics are not shown.

Customer premises

The retail operator’s router (CPE) and the OLO’s ONT, which terminates the fibre. The ONT sits in the home but belongs to the OLO.

OLO access network

ODN, passive splitter, OLT and access aggregation — owned, allocated and configured by the OLO in its own inventory and OSS. The retail operator never sees these resources, only the OLO line ID.

NNI — the handover

The network-to-network interface between the two operators, built once and shared. Per order, only the customer’s VLAN on it (C-VLAN under the NNI’s S-VLAN) is allocated — by the retail ROM, and carried in the wholesale order.

Retail IP edge

The retail operator’s BNG and AAA / RADIUS: the subscriber session on the customer VLAN, the IP address, the 1 Gbit/s / 100 Mbit/s profile. Allocated by its ROM, recorded in its inventory with the OLO line ID beside them.

IP core & Internet

The retail operator’s IP network and the Internet. Shared by every customer, on-net and off-net alike.