Karel MS128, Инструкция по установке и обслуживанию

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Karel MS128 Installation & Maintenance Guide
Edition 3.2
29
The EVM-FE card with a Flash ROM memory chip preserves the special messages
for Auto Attendant purposes. At most two EVM-FE cards can be installed on the
EVM128 card in addition to the onboard one. Each EVM-FE card has a message
capacity of 2 minutes. Thus, EVM128 can have a maximum Auto Attendant
message capacity of 6 minutes. 24 different messages to be used during different
states of call handling of Auto Attendant can be entered. These messages are
retained even when the system power is off.
The EVM-DE card with two Dynamic RAM chips stores messages for the Voice
Mail purposes. At most three EVM-DE cards can be installed on the EVM128 card.
Each EVM-DE card can provide a total message capacity of 15 minutes. Thus,
EVM128 can have a maximum Voice Mail message capacity of 45 minutes. The
capacity per EVM-DE card may be also increased to 20 minutes by programming,
in which case the voice quality is impaired to a certain extent, but the difference
cannot be recognized by human ear. The Voice Mail messages are lost when the
system power is off.
EVM128 supports two voice channels, used by both Auto Attendant and Voice Mail
facilities. That is, EVM128 can serve two users at a time, to record and listen to the
messages. The two LEDs on the card are used to show the states of these voice
channels. At start up, these LEDs blink till the system recognizes EVM128. Then,
each LED stays on while the corresponding channel is idle and stays off when the
corresponding channel is in use.
The external callers can make use of the EVM128 facilities, only if they have DTMF
telephone sets in order to be able to key in numbers whenever required by
EVM128.
The outlook of EVM128, EVM-FE and EVM-DE cards is illustrated in the following
figure.
Figure A-21
EVM128 is located on the rack top plate below the top cover of CBN128 cabinet
(see Figure A-3) and connected to the 10-pin connector on MS128 CPUKON card
via the 10-pin flat cable that comes with EVM128 itself (see Figure A-6).
The dimensions of EVM128 are 9 cm x 18 cm and the weight is 0.1 kg.
The dimensions of EVM-FE and EVM-DE are 6.5 cm x 3.5 cm.