Iridium Pilot Quick Start Manual page 14

STEP 11: PLACE A TEST CALL
Using a normal handset connected to the "Voice 1" port on the IDU place a call.
1. Ensure the SST software has been stopped.
2. Lift the receiver and listen for a dial tone.
3. Dial the country code, area code and phone number of a phone that can be used for voice
quality testing. Don't forget to press the # key to initiate the call.
4. When the call is answered verify there is intelligible voice in both directions.
5. If any issues are detected, hang-up and attempt the call again. If the problem persists,
attempt a call to an alternate test number preferably in a different exchange (different
provider) from the initial attempt.
6. If after all of these attempts there is still an issue consider the following:
• Clear voice from the Iridium Pilot Land Station unit to the landline and garbled voice in the
other direction is typical of local interference disturbing the down-link signal.
• If the clear voice is from the land-line side and the Iridium Pilot Land Station side is garbled
then there is likely another issue and you should consult the trouble-shooting section of the
User Manual.
• If the call is not clear in either direction then there could be an interference issue.
An alternate location should be considered.
• If the call fails to connect go to the trouble-shooting section of the User Manual.
Note: Voice quality of the Iridium Pilot Land Station network is characterized as narrow band telephony.
Signi cant voice compression is used in transporting voice and it can sound slightly degraded from
a typical mobile telephone call.