4-10
Chapter 4
Installing Processor and Interface Cards
This card automatically detects DTMF or dial pulse signals from an SLT. Software and hardware
settings are not required. The 8SLI has no DTMF receivers; it will share the system resources. If
there is a medium to high concentration of 8SLI cards or traffic, one or more MFM
daughterboards should be added to a processor card to relieve congestion.
NOTE:
1. Do not connect devices with a total REN greater than 5.0 to this card.
2. Ring Frequency: 25 Hz square wave
Ring Voltage: 120 volts peak to peak, 20 milliamps of current
3. SLI port feed voltage is nominally 50VDC.
4. This card does not contain OPX over-voltage protection circuitry.
16SLI Card
There are no options to select on this card (Figure 4-15). Insert up to seven 16SLI cards as
required into universal slots 1 to 9 (Figure 4-2
). Push firmly in the middle of both card ejectors on
each card to ensure that it is fully inserted into the backplane connector. This card automatically
detects DTMF or dial pulse signals from an SLT. Software and hardware settings are not
required. The 16SLI has no DTMF receivers; it will share the system resources. If there is a
medium to high concentration of 16SLI cards or traffic, one or more MFM daughterboards should
be added to a processor card or cards to relieve congestion.
NOTE:
1. Do not connect devices with a total REN greater than 5.0 to this card.
2. Ring Frequency: 25 Hz square wave
Ring Voltage: 120 volts peak to peak, 20 milliamps of current
3. SLI port feed voltage is nominally 25VDC.
4. This card does not contain OPX over-voltage protection circuitry.
BRI (S
0
T
0
) Card
CAUTION: Do not
insert the card with system power on. Switch the power OFF.
There are two options to select on this card (Figure 4-15): termination on or off. Insert the card
into any universal slot (Figure 4-2
). Push firmly in the middle of both card ejectors on each card
to ensure that it is fully inserted into the backplane connector.
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