3-22
Chapter 3
Installing Printed Circuit Cards
16MWSLI CARD
There are options as same as 16SLI CARD. Insert up to seven 16MWSLI cards as are needed into
universal slots 1 through 7. Push firmly in the middle of both card ejectors on each card to ensure
that it is fully inserted into the back plane connector.
This card automatically detects DTMF or dial pulse signals from the SLT. Software and hardware
settings are not required. The 16MWSLI supports industry standard message waiting lamps on
single line phones. The message waiting power supplied to the single line station in the iDCS is 90 to
100 VDC. The 16MWSLI has no DTMF receivers; it will share the system wide DSP resources for
DTMF decoding. When the 16MWSLI cards are highly utilized with congested traffic, the ratio of
DTMF receiver will be decreased. Therefore, the MFM boards or daughter board should be added to a
processor card to relieve the bottleneck.
NOTE:
1. If a cabinet is equipped with a single power supply unit (PSU-B), a maximum of 56 station
devices may be connected to that cabinet. However, if the cabinet is equipped with two power supply
units, a maximum of 120 station devices may be connected to that cabinet.
See the configuration
section of the General Description Guide for more details
.
2. Do not connect devices with a total REN greater than 5.0 to this card. (Except for Australia. Australia
use an external ringer.)
3. Ringer Frequency:
External Ringer, 20Hz , 80Vrms , SINUSOIDAL WAVE (For Australia, and Italy)
Internal Ringer, 25Hz, 80V , RECTANGULAR WAVE (For the other countries in Europe)
4. This card does not contain OPX over voltage protection circuitry.
5. The message waiting circuitry only illuminates the message lamp when the station is idle.
Therefore, a 16SLI card and the 16MWSLI card follow the same configuration rules when
considering a single or double power supply.
6. SLI port feed voltage is nominally 25VDC.
