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Diagram explanation
Every R2 is indicated with a different colour, and next to every R2 is a table shown with 8 incoming
fiber audio channels and 8 outgoing fiber audio channels. Between two devices, a connection
line is shown representing the fiber conductor, and next to this connection line is always a table
shown which indicates the audio channels the fiber conductor is carrying at this point. The
audio channels between the output from the previous device and the input of the next device
are always unchanged. This is clearly displayed by means of the text colour inside the tables.
When APM paging consoles are connected and paging over fiber enabled, then channel “Fb
1” is dedicated for paging use and can’t be used to exchange other audio channels. For this
reason, channel “Fb 1” is always marked with “Paging”.
An overview of the audio signals transmitted over the fiber interface:
- Fiber channel 1 (Fb 1):
This channel is dedicated for paging purposes
- Fiber channel 2 (Fb 2):
The Red R2 (R005) transmits an audio signal over fiber
channel “Fb 2”. This signal reaches all devices and can
be used by all devices.
- Fiber channel 3 (Fb 3)
:
Same as channel “Fb 2”, the Red R2 (R005) transmits an
audio signal over fiber channel “Fb 3”. This signal
reaches all devices and can be used by all devices.
- Fiber channel 4 (Fb 4):
The Yellow R2 (R001) transmits an audio signal over fiber
channel “Fb 4”. This signal reaches all devices and can
be used by all devices.
- Fiber channel 5 (Fb 5):
The Blue R2 (R003) transmits an audio signal over fiber
channel “Fb 5”. This signal reaches all devices and can
be used by all devices.
- Fiber channel 6 (Fb 6):
Channel 6 is used by two R2’s. The Orange R2 (R004)
transmits an audio signal over fiber channel 6 “Fb 6”, and
this signal reaches the Red R2 (R005), the Yellow R2
(R001) and the Green R2 (R002). The Green R2 (R002)
replaces the signal on fiber channel “Fb 6” by another
audio signal, and this audio signal reaches the Blue R2
(R003) and the Orange R2 (R004).
-Fiber channel 7 (Fb 7):
Fiber channel 7 (Fb 7) is used by all R2’s. Every R2
receives and transmits an audio signal over this channel.
This way, every R2 can use a source of the previous R2
and replace it by another signal which can be received by
the next R2 in the ring network.
- Fiber channel 8 (Fb 8)
:
Same as channels “Fb 2” and “Fb 3”, the Red R2 (R005)
transmits an audio signal over fiber channel “Fb 8”. This
signal reaches all devices and can be used by all devices.
Summary of Contents for R2
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