User's Manual
Page Center User Manual MNT-PC-VB
Page 10
3.2 Placing Telephone Calls from the Two-Way Radio
Two-way radios can place "autopatch" telephone calls through the PAGE CENTER to a telephone line
connected to the rear of the PAGE CENTER.
The PAGE CENTER 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 PAGE CENTER. One is that the two-way radio user will hear an occasional ticking sound.
This is the PAGE CENTER 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 PAGE CENTER switches between transmit
and receive modes.
The PAGE CENTER uses a Voice Operated Switch (VOX) circuit on the telephone line. VOX circuit switches
the PAGE CENTER 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 PAGE CENTER that you wish to
place a telephone call.
2. Listen for the confirmation beeps to come back from the PAGE CENTER. 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 PAGE
CENTER transmits his or her voice.
5. A periodic ticking sound will be heard by the mobile user as the PAGE CENTER 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 user may press
* in order to reset
the timeout timer and continue the phone call.
8. End the conversation from the two-way radio 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 PageCenter has 10 "auto-dial" memories containing telephone numbers which can be automatically dialed.
See the PAGE CENTER 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.