|telecom = exchange|
|A place to connect landlines subscribers to telecommunication service equipments|
|Used on these elements|
|Tools for this tag|
An Exchange (722-06-05) is a place (i.e physically a building or a cabinet) containing several services equipments including telecom switches, transmission and amplification equipment, main and/or secondary distribution frames. It connects local loops (subscribers side) to backbone and long distance networks.
A telephone exchange is a building, a part of a building or in some countries a street cabinet which connects a subscriber's home with the service provider devices. A lot of switching equipments are located in exchanges, including the Main Distribution Frame which is actually inside the building (and shouldn't be confused with the real building). This document means that exchanges can be hosted in street cabinets for sake of space savings, which doesn't imply that all telecom street cabinets are actual exchanges. Especially connection points shouldn't be confused with real telecom exchanges.
|telecom=*||exchange||The exchange building should be mapped as for those which are located in a dedicated building. For the others (recent ones in street cabinets, part of building,...), a may be used.||mandatory|
|building=*||service||When located in a dedicated building.||optional|
|building:prefabricated=*||yes||When the telecom exchange is located inside a prefabricated building||optional|
|man_made=*||street_cabinet||When the telephone exchange is in a street cabinet.||optional|
|street_cabinet=*||telecom||required with man_made=street_cabinet|
|telecom:medium=*||<medium type>||The type of local loop it is used to. See below for possible values.||recommended|
|operator=*||<operator>||The name of the company that operates the central.||recommended|
|owner=*||<owner>||The name of the organization which has the ownership of the central (State or local administritive organisation for example)||optional|
|ref=*||<reference>||Telephone exchange reference if applicable. See ref:FR:PTT=* or ref:FR:Orange=* for French example||recommended|
Exchanges in cabinets
Actual exchanges in cabinets, for rural or developing areas, can easily be confused with other features. Let's try to make things clear.
An exchange always involves services devices and distribution frames to connect subscribers lines.
- A Connection point is different as it only had a patch panel to connect subscribers lines but misses one or more service devices. See telecom=connection_point
- A Service device is also different as it's only an active device but no actual distribution frame to connect subscribers lines. See telecom=service_device.
More than one exchange in the same building
Due to fibre optic modern networks rollout, situations can occur with multiple different nodes in the same building. We should not tag the building itself but create as many nodes as exchanges exist in the building.
In case of copper and fibre exchanges are located in the same place two nodes should be created and get respectively telecom:medium=copper and telecom:medium=fibre.
Two exchanges are on and inside the building polygon.
Once the copper network decomissioned we'll delete the copper node and the fibre one will remain untouched.