Operation
IPE2500A and IPE2500A-MLS Paging Encoder/Desktop Controller
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Direct DTMF Dialing
The IPE2500A supports a configurable Direct DTMF dialing mode that allows the operator to quickly
generate DTMF transmissions without the need to use preprogrammed aliases or the paging operation of
the unit. This is useful for controlling repeater operation or accessing remote devices that use DTMF as
a selective signaling protocol. The unit supports two different direct DTMF dialing modes: timed and
PTT-controlled direct DTMF dialing.
N
OTE
:
When Direct DTMF dialing is enabled, the numeric keypad can no longer be used to directly
select a new frequency and the
SELECT
button must first be pressed to enter the frequency selection
mode.
Timed Direct DTMF Dialing
To use timed direct DTMF dialing, the handset can be on- or off-hook. In this mode of operation, to
begin a direct DTMF dialing sequence, the operator simply begins pressing the DTMF buttons in
sequence. After the transmission is initiated, the unit will begin generation of the DTMF digits that have
been entered. The display will show on the second line, “D-DTMF:” and the DTMF digits as they are
generated. While in direct DTMF dialing, the operator can continue to enter DTMF digits during the
direct DTMF dialing hang time described in the “Enabling Direct DTMF Dialing” section below. If the
user presses and holds a DTMF button, the DTMF digit will be generated for the duration of the button
press. If, however, the user simply taps a DTMF button or enters several digits in rapid succession, a
140-ms to 150-ms DTMF digit with 50-ms inter-digit time will be guaranteed. It is not necessary for the
operator to wait for the generation of the DTMF digit to be heard as the unit will buffer up to eight button
presses.
If the unit has been configured with a page PTT pre-time using CARD Suite, the unit will guarantee that
the transmission has been initiated for this time before beginning generation of DTMF digits. The
operator can press DTMF buttons during this time, but the digits will not be generated until the page PTT
pre-time has elapsed.
After all digits have been transmitted, the operator simply has to wait until the direct DTMF dialing hang
time expires, or press and release the main
TRANSMIT
button or handset PTT, and the unit will return to
receive mode.
PTT-Controlled Direct DTMF Dialing
At any time, pressing the main
TRANSMIT
button or lifting the handset and pressing the handset PTT
while off-hook will begin normal voice transmission. While holding the main
TRANSMIT
button or
handset PTT, the operator can generate DTMF digits immediately by pressing a DTMF button. Voice
audio will be muted during the generation of a DTMF digit and will be unmuted otherwise.
To generate the DTMF sequence, the operator simply presses the desired DTMF buttons to generate the
proper sequence. As in timed direct DTMF dialing, a minimum 140-ms DTMF digit with a 50-ms inter-
digit time is guaranteed. In order to return to receive mode, the operator releases the handset PTT.
If the unit has been configured with a page PTT pre-time using CARD Suite, the unit will guarantee that
the transmission has been initiated for this time before beginning generation of DTMF digits. The
operator can press DTMF buttons during this time, but the digits will not be generated until the page PTT
pre-time has elapsed.
Summary of Contents for IPE2500A
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