Carrier Access Access Bank II SNMP - Manual (Page 101)

12-Channel FXO & Dial Pulse Termination Card
10-4 9/24/01
• detect battery reversal from the PBX for call progress and confirmation of call comple-
tion.
10.3.3 Channel Attenuation Options
Each of the 12 channels can be configured to attenuate both the transmit and receive audio signal.
Each channel has a 6-position dip switch; three positions for transmit attenuation and three positions
for receive attenuation. The switch positions apply different values of attenuation, and are additive (if
more than one switch is set to apply attenuation for a specific channel, the attenuation value for the
channel is the sum of those switches).
The loss is measured in decibels (dB). Note that a 3dB loss implies the average power is reduced by
50%.
The following table shows the values of attenuation applied for each switch position.
Note: Attenuation is applied when the switch is in the OFF position, and is removed
when the switch is in the ON position.
Caution: Use proper electrostatic discharge (ESD) procedures when
handling the analog cards.
Table 10-2: Transmit and Receive Attenuation Switch Values
Switch
Setting
Transmit Switch Position Loss Receive Switch Position Loss
1 2 3 4 5 6
On 0 dB 0 dB 0 dB 0 dB 0 dB 0 dB
Off -2 dB -3 dB -4 dB -2 dB -3 dB -4 dB
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