Carrier Access SNMP Channel Attenuation Options, Transmit and Receive Attenuation Switch Values

12-Channel FXO & Dial Pulse Termination Card

•detect battery reversal from the PBX for call progress and confirmation of call comple- tion.

10.3.3Channel 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.

Table 10-2: Transmit and Receive Attenuation Switch Values

Switch	Transmit Switch Position Loss			Receive Switch Position Loss
Setting	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

Caution: Use proper electrostatic discharge (ESD) procedures when handling the analog cards.

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