2. RECORDING
The messages of the announcer must be recorded and stored before use. Usually the
spoked masseges are stored using normal telephone. The unit is controlled with DTMF-code
commands. Also it is possible to enter recording using line interface in the front panel from
CD or tape recorder.
In order to program the user must enter programming state. 1-way : It can be reached by
using the front panel Program-switch, and calling the 1st line. The unit gives spoken voice
guide. The programming mode is ended when the switch is placed into another position. This
requires that the unit is in default position or programmed to operate this way. 2-way is that
the unit called using 1-line. When the unit answers the user gives
V
0 <password># command
and enters the programming state. The programming state is ended with ‘0# command.
Megavoice can have up to 9 messages 1...9. Here a message number is indicated using m.
Message 9 is voice guide. Installer sets up or uses the default values to control the unit give
certain message on certain line or certain mode (day/night/vacation/program). The old
messages is played back with
V
3 m #, like
V
31# for message 1. Message is removed with
V
1 m # and new message is recorded with
V
2 m #. Recording and playback stops with #.
The recording level is suitable when the red led flashes now and then. The programming
messages are decribed in the Programming section of this manual.
RECORDING TECHNIQUES
The recordings can be entered with telephone call, head set mic-connected directly to
Megavoice, with line level ( 0.8 V) interface from CD or recorded or PC. The operations are
controlled in all cases using line 1 with a DTMF telephone. The levels or the mic and Line
interface can be adjusted with a level setting in the front panel. The best result can be
reached using front panel line interface but telephone is usually adequide. The recordings
can be edited using PC or recorders. With suitable sofware the voice can be compressed and
mixed for the telephone lines but this needs some knowledge. Many times the recordings can
be mixed acustically ; the back ground music can be recorded using CD-player playing on the
back ground on the desk. This takes some test runs but it works well.
The Megavoice has a very sharp band pass filter (apx. -50 db/oct) from 230...3400 Hz. The
front panel level meter leds indicate the digitized signal with this filter and indicates the real
digital audio level recorded. Red led is -9dBm, yellow is -17dBm, green is -23dBm. -9Bd is
apx. the level of the dial tone in the telephone network which is usually the target level of the
messages. It is good idea to compare own recordings with dial tone. Also an ear is more
sensitive to higher frequencies and it has to be compensated sometimes by lower the level.
Usually the recording level is ok if the red led flashes occasionally. Automatic level
adjustement is not used because it can not be controlled well. 0dBm=775mV @ 600 Ohm
here.
If PC software compression is used, cut the low (<200Hz) and high frequncies (>3400Hz)
before compression ( normalisizing). Good results are obtained using 1:4 compression for
telecom network.
7
MEGAVOICE 2000 V.3.1 MANUAL V.2000-09-20
