TM 1-1510-225-10
3A-13
1. Base Unit Hookswitch
2. Handset Speaker
3. Press-to-Talk Switch (PTT)
4. Numerical Keys
5. Enter Key
6. Clear Key
7. Handset Hookswitch
8. Noise Canceling Microphone
9. Coiled Cord
10. Base Unit
11. Transmit Lamp (TX)
12. HF Bell Off Phone Switch
13. Direct Dial Lamp (D/DIAL)
14. Intercom Lamp (IC)
15. Handset Locking Post
16. Volume Control
17. Noise Canceling Tube
Figure 3A-4. Airborne Telephone
2. Idle manned ground stations.
3. Busy AGRAS stations.
4. Busy manned ground stations.
5. Busy
AGRAS
stations
with
queuing
capability.
If no ground station is available, a busy signal
will sound in the handset.
(1) Air to Ground Calling.
1. Handset – Remove from base.
2. Handset
–
Listen
to
audio
to
determine which one of the following
dialing procedures to use.
(a) Dial tone (D/DIAL light illuminated).
1. Phone Number – Enter using
numeric keys.
2. Handset – Listen for queue or
camp on tone.
3. Handset – Hang up and wait for
phone to ring.
NOTE
Phone will ring when first usable station is
received.
4. Handset – Pick up when phone
rings. Call is placed automatically.
NOTE
Press Q key to cancel queue if desired.
(b) High Pitched Tone. No direct dial
station is available. The strongest operator assisted
station has been selected.
1. OPER Switch – Press to call
mobile operator.
2. When mobile operator responds:
