User Manual

OSMAC BaseOSMAC Base User Manual
Page 10
3.2 Placing Telephone Calls from the Two-Way Radio
Two-way radios can place "autopatch" telephone calls through the OSMAC BaseOSMAC Base to a telephone line connected to
the rear of the OSMAC BaseOSMAC Base.
The OSMAC BaseOSMAC Base operates in a simplex mode. In other words, it can only receive or transmit at any given time,
and not both simultaneously. If it is transmitting, it cannot receive, and when it is receiving, it cannot transmit.
Because of this, there are a number of things to keep in mind when making or receiving a telephone call through
the OSMAC BaseOSMAC Base. One is that the two-way radio user will hear an occasional ticking sound. This is the OSMAC OSMAC
BaseBase periodically checking for transmissions from the two-way radio. The other is that users must learn to wait
about a second before talking whenever the OSMAC BaseOSMAC Base switches between transmit and receive modes.
The OSMAC BaseOSMAC Base uses a Voice Operated Switch (VOX) circuit on the telephone line. VOX circuit switches the
OSMAC BaseOSMAC Base from transmit mode to receive mode when it detects that the audio coming in from the telephone
line has stopped.
To place a telephone call:
1. Press the *7keys on the two-way radio's DTMF keypad. This tells the OSMAC BaseOSMAC Base that you wish to place
a telephone call.
2. Optionally listen for the confirmation beeps to come back from the OSMAC BaseOSMAC Base. If autopatch operation has
been disabled from the Configuration Menu, then alternating high and low beeps will signal an error. If
voice prompts have been enabled, then a dial tone will be heard instead of the beeps.
3. Begin dialing the telephone number you wish to call after the dial tone ends. At the end of the telephone
number, you may enter a * to dial the phone number. Alternatively, the phone number will be dialed if no
keys are pressed after a few seconds. The DTMF tones being sent to the phone line will be heard to
confirm dialing.
4. Once the called party answers, the phone VOX circuit takes over. When the called party speaks, the OSMAC OSMAC
BaseBase transmits his or her voice.
5. A periodic ticking sound will be heard by the mobile user as the OSMAC BaseOSMAC Base briefly switches to receive
mode to determine whether the mobile user wishes to interrupt the conversation and has begun
transmitting.
6. If neither party is talking, a single beep will be heard periodically to remind the mobile user that the phone
patch is still in operation.
7. A timeout timer exists in order to shut down the phone patch automatically in the event that the mobile user
goes out of range or has a battery outage. Warning beeps or a voice message will be sent 30 seconds before
the timeout timer expires and the phone call is terminated. The mobile or phone user may press * in order
to reset the timeout timer and continue the phone call.
8. End the conversation from the two-way radio or the phone by pressing the # key. A high, then low beep
sequence or a voice message should be heard to confirm the disconnection.
3.3 Autodial Calls
The OSMAC BaseOSMAC Base has 10 "auto-dial" memories containing telephone numbers that can be automatically dialed.
See the Programming section for information on how to program these numbers.
In order to make an Autodial call from a two-way radio:
1. Press the *6 keys on the two-way radio's DTMF keypad, followed by the number of Autodial memory
you wish to place the call to. Memory number 0 will be used if no number is sent after the *6 command.
2. Operation continues from step 4 as described above.