Backbone: Designates an interconnected core area of a telecommunications network with very high data transmission rates
BAKOM: The Federal Office of Communications, issues guidelines and recommendations (technical guidelines for FTTH installations in building, physical media)
BB: behold Backbone
BBP: Backbone partner
BEP/HAK: Building entry point for optical fibre connections. this is the connecton point for the end customer's OTO
Best effort: Desigates minimalist guarantee of quality of service in telecommunications networks
Breakout Cable: Multi-channel cable made from complete single cables with the plugs already mounted before installation
B-SP: Business Service Provider
BV: Business agreement
Byte: Unit of measure in digital technology and computing, mostly reresenting an 8 bit sequence
Dark Fibre: Optical fibre cable sold or leased unlit. The optical cable is spliced point to point between two locations
DP: Distribution Point, the last branch/splicing point before the house connection, often in a socket in a manhole
Drop Cable: Cable in exchange area
DWDM: Dense Wavelength Division Multiplex. Multiplex procedures are methods of signal and message transfer which combine multiple signals and send them simultaneously via a medium. Dense Wavelength Division Mulitplex is currently the most powerful variant
EPL: A transparent Ethernet service (EVC) between two dedicated Ethernet interfaces (ports)
EP-LAN: A transparent Ethernet service (EVC) between three or more Ethernet interfaces (ports)
Ethernet: Ethernet is a technology used for a data network connected by cable. It enables data to be exchanged in the form of data packets between devices connected to a local network
EV: Single Agreement / End Customer Agreement
EVC: Ethernet Virtual Connection
EVPL: Ethernet Virtual Privat Line is a data service supporting a point-to-point Ethernet connection between a pair of network user interfaces
EVU: A utility company is a company which supplies ist customers with utilities (electricity, water, gas and telecommunications)
FLL: Fibre Local Loop. Leasing individual optical fibres from the connection hub (CO) to the end customer's optical socket (OTO)
FTTA: Fibre To The Antenna
FTTB: Fibre To The Building
FTTC: Fibre To The Curb
FTTH: Fibre To The Home designated a telecommunications network operated using optical fibres as far as every business, multi-occupancy or family dwelling
Gbps: Information about data transmission rates is measured in an amount of data units per time unit. The smallest data unit is the bit, which is why the bit rate id often given using bits per second (bit/s)
LAN: Local Area Network Computer network exceeding the scope of a personal area network but smaller in scope than a wide area network. A LAN's scope is therefore limited
Layer 1: The physical layer is the lowest layer in the OSI model. This layer provides mechanical, electrical and other functional tools to activate and maintain physical connections and transfer bits via them
Layer 2: Under the OSI model the role of the data link layer is to ensure reliable (i.e. largely faultless) transmission and control access to the transmission medium
LC/APC: Lucent Connector - Angled Physical Contact. Optical connector version
Lead Time: Delivery time / Allocation time
LEX:
LWL: Optical fibre. Cables made using fibre optics and fitted with pluf connectors, used to transmit light in the visible, ultraviolet and infrared spectrums
Mbps: Information about data transmission rates is measured in an amount of data units per time unit. The smallest data unit is the bit, which is why the bit rate is often given using bits per second (bit/s)
MCSPC: Multi City Service Provider Connection
MTTR: Mean Time To Repair - average (not guaranteed) time to repair a fault. This is the period between a fault being detected and its being repaired
MEF: Metro Ethernet Forum was founded in 2001 and is an international industrial non-profit consortium devoted to the worldwide adaption of carrier Ethernet networks and services
MRC: Monthly Recurring Charges
MTU: Maximum Transmission Unit - defines the maximum data packet size which can be transmitted without fragmentations in layer 2 frames under the OSI model
Multicast: Designates a message transmission from a single point to a group (also called a multipoint connection)
Multimodefaser: Several thousand modes can be prpagated using these
Off-Net: Locations without an optical fibre connection
OHDF: Optical Handover Distribution Frame. This distribution frame is the end point for optical connections from Swisscom. The OHDF is in the telecommunications service provider's area and is the interface between Swisscom and the telecommunications service provider
On-Net: Places which are developed with fiber net
ONT: Optical Network Termination.
Open Access: Open access networks are designed to be open to all service providers with no discrimination
OSS/BSS: Operations Support System. Describes a network management system supporting automated service processes. These are also supplemented by what are called Business Support System (BSS) for order processing, accounting and customer payments
OTC: One Time Charges
OTO: Optical Telecommunication Outlet. Is installed in every dwelling or business unit and forms the connection with the optical network
Packet Loss: Occurs in packed-based data transmission within networks. If the transmission medium does not function as expected, some data packets may not reach the specified target
Patchen: to patch
PBV: Partner Agreement
PoP: Point of Presence. Point at which the telecommunications provider has an entry point to their own network
Port: Designates an external interface to which further devices can be connected using a cable or into which plug-in cards may be inserted
Protection: In communications networks, designates the option of automatically switching to redundant resources in the event of a fault
Qos: Quality of Service. Describes the quality of a communication service from the user's point of view. QoS is technically an amount of quality specifications required of the overall procedure in terms of interplay between multiple objects
SDH: Synchronous Digital Hierarchy. Multiplex technology enabling low-rate data streams to be combined into a single high-rate data stream
SDT: Service Down Time. Designates the duration for which a service is not available in accordance with the contractual agreement
Service Provider Access Line: Fibre net connection
Set-Top-Box: Device connected to another device (usually a television) which offers the user additional usage options
SFN: Swiss Fibre Net
SFP: Small Form Factor Plugable
SGF: Strategic Business Area
Single Mode Faser: Have a very small core diameter through which only the basic mode can be dissemnated
SLA: Service-Level-Agreement. Designates an agreement between the customer an the service provider for recurring services. Its objective is to make the means of control transparent for the customer by precisely describing guaranteed service characteristics such as scope of service, reaction time and processing speed
SME: Small and medium enterprises
Slamming: Designates unauthorised placing of an order without a purchase order from the end customer
SPF: Service Provider Feed
SPV: Service Provider Vertrag
Spleissen: Connection of fibre net with both-way ends
Suspension time: Periods not take into account in measuring/calculating service down time (SDT)
Switch: Coupling element used to connect network segments with each other
Unicast: Designates the transmission of messages between a sender and a single receiver
UNI: User Network Interface. Interface where the service is transferred to the customer. The UNI is the border defining the different areas of responsibility for SFN and the customer
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