Specifications

Network Configuration Specifics
287
wiring schemes are always preferred as they can be connected in star and ring configurations
with little change within the building.
Ethernet cable distances
Cable runs for Ethernet are specified up to 100 m when the correct cable type is used. This
includes the internal building wiring as well as patch leads at either end. The limitation on this
distance is quite strict and operation is not guaranteed beyond a total length of 100 m. More
details can be found in ANSI/EIA/TIA-568-B 200, section 4.
Internal building, or horizontal cable runs, should not exceed 90 m, to allow for an additional 5
m of cable at both ends for connection to the end devices from the wall jack. Additional
connections in the cable run add attenuation. Use the guidelines in the following table for
installation.
These recommended distances are shown in the following figure.
Figure 49: Recommended Distances for Cable Runs
Note: If connecting an ethernet device at distances of more the 100 metres, then a unit
such as the Mitel Streamline should be used. The Streamline is a long haul ethernet
switch that can provide ethernet connectivity with power over distances of up to 360
metres. For details refer to the Streamline documentation on Mitel On Line.
Table 83: Recommended Distances for Cable Runs
Cable run Maximum recommended distance
Horizontal or intra-building run Less than 90 m
Wall jack to end equipment (IP phone) Less than 3 m
Layer 2 switch to MDF (direct connection) Less than 3 m
Layer 2 switch to power hub Less than 2 m
Power hub to MDF Less than 2 m