CBL AirLaser IP100plus, Руководство пользователя

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7.6 Services
FSO Characteristics
The free space distance (FSO) can be interrupted by different events briefly or also longer. Short events are
caused for example by flying birds or falling leaves. These interruptions last typically some 10 to some 100
ms. Longer interruptions result usually from influences of the weather such as fog and take typically some
minutes up to some hours.
To get the maximum availability of the fso-link you should configure the change-over to the backup in such a
way, that short events do not lead to switching to the backup path. Short interruptions become hardly
apparent in the network. This delay time for switching to the backup path is the so-called Backup Delay.
If the AirLaser switched for example because of fog to the Backup, then it is reasonable to remain a minimum
time in the backup so that the system does not constantly switch between backup and optical path in case of
fast changing weather conditions. The switch back delay is responsible for switching back from the backup to
the optical path.
Except the two time criteria for the change-over there is another criterion for the amplitude of the optical
signal, the optical hysteresis. Thereby you specify by which amount the receipt levels after the interruption
must rise, so that the system changes over to the optical path. Not until the value of optical hysteresis was
exceeded, the switch back time starts to run.
Type Default Description
Optical Hysteresis Integer Disabled By this amount the optical level must exceed the sensitivity
limit of the receiver, so that the system changes over to the
optical path.
Backup Delay Integer 500ms Time interval from the beginning of the interruption of the
optical path, until backup path is used.
Switch Back Delay Integer 30s Time interval from the end of the interruption of the optical
path, until optical path is used again.
TP2 PoE Support
The port TP2 is equipped with a PoE controller (PSE), which makes it possible to supply IEEE802.3af
compatible devices directly with power. Also a forced mode is implemented, which can supply a 50% higher
current compared to the IEEE802.3af mode.
Maximum current in IEEE802.3af mode:
350mA
Maximum current in forced mode: 525mA
Note! In the forced on mode the TP2 port leads always a voltage of up to 56V, even if no equipment is
attached to the port. Devices, which are not suitable for this mode, can be damaged by connecting
them to the TP2 port!
Type Default Description
Mode Integer Disabled Selects the operation mode for the PoE controller.
Disabled: PoE is off.
Auto: Mode for IEEE802.3af compatible equipment
Forced On: Proprietary mode e. g. for AirLink
Status Power Off: PoE is off
Delivering Power: PoE is on
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