Document No. 8128000560
Software Revision – N1B (07 Oct 04)
7-70
RT-9000 B
5. If the indicated Network (which is the Current Network) IS NOT the desired Network, select the
desired Network by rotating the ‘TUNING” knob until the desired appears and stop..
6. Depress the Enter (‘ENTR’) key, then the ‘END’ key. The Feature Menu Display shown in Figure
7.3.4.6 will re-appear.
7. Depress the ‘END’ key again. The RT-9000 B front panel display shown in Figure 7.3.4.5 will
reappear. The user may return to ALE Operation and continue ALE Transmit calling operations.
Once the operating frequency Channel Group and the ALE Current Network is confirmed, the operator may
proceed to detailed operating instructions that follow for each calling method.
7.3.4.4 Point-to-Point Calling
The Point-to-Point Calling method is used to call a specific Network Station on all frequencies (or Channels)
in the currently selected Channel Group. A Point-to-Point Call expects a response from the Called Station.
When the RT-9000 B initiates a Point-to-Point Call, it will transmit its call on the first frequency in the Channel
Group and then listen for a response before it moves to the next frequency and repeats the process. Calling
will continue until a response is received or the Point-to-Point Calling sequence ends. The initiating station of
a Point-to-Point Call will proceed through the selected Channel Group (calling and listening on each
frequency, in sequence) up to two (2) complete times if a response is NOT received.
7.3.4.4.1 Transmitting a Point-to-Point Call
To transmit a Point-to-Point ALE call to another Network station, perform the following steps:
1. Select the CALL ID of the Called Station for a Point-to-Point Call using the process described at the
end of section 7.3.4.2.2.4 Entering Network Station CALL IDs
.
2. Depress the ‘*’/’ALE’ key. The front panel display shown in Figure 7.3.4.13 will appear.
3. Depress the ‘TX-ALE’ (Transmit ALE) key at 7 to initiate the call to the selected station on the
frequencies in the selected Channel Group.
4. While the calling process is underway, the Operational Display will indicate the CALL ID of the station
being called and the frequency & Channel Number being used at that instant to transmit the call.
Transmission on each channel continues for approximately 3 seconds before changing to the next
channel in the Channel Group.
5. ALE signaling tones may also be heard during the Initiating Station’s Receive period as they being
transmitted back from the from the Called Station.
6. Figure 7.3.4.16 shows an example of how the Operational Display appears during the calling
process.
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