Carrier Access SNMP manual Setting the FXS Signaling Options, Option Switches A, B, and C

FXS-ID Configuration

4

5

6

7

OFF	OFF	ON	E&M immediate-start-to-ground-start
			conversion with ringback to T1 line
			(Megacom, Note 1).
ON	OFF	ON	Wink-start-to-loop-start conversion with
			ANI/DNIS with 800 ms wink delay and
			calling party disconnect (Notes 1, 2 and
			3).
OFF	ON	ON	Wink-start-to-ground-start conversion
			with ANI/DNIS with 800 ms wink delay
			(Notes 1 and 3).
ON	ON	ON	Custom Signaling Options. Please
			contact Carrier Access Corporation for
			specific details (Note 4).

Note 1: Loop release implemented to prevent follow-up calls until the network A/B clears (no timer).

Note 2: Calling party disconnect implemented as a 2-second tip-open state when the network A/B clears.

Note 3: Wink-out provided after loop answer instead of after network seizure. This is the key dif- ference between options 1 & 2 and options 5 & 6.

Note 4: If you select this DIP switch setting with no custom signaling option installed, the 12 channel LEDs on the FXS back plate turn a steady RED and normal service is interrupted.

8.5 Setting the FXS Signaling Options

Each FXS-ID card contains one 4-position DIP switch that can be used to select signaling options for all twelve channels. As shown in Table 8-2, the AB2 back plate provides openings for accessing these DIP switches, one per FXS-ID card.

8.5.1 Option Switches A, B, and C

The three switches labeled Option A, Option B, and Option C are used as a group to select signaling conversion options for all 12 channels of each FXS-ID card. When all three switches are set OFF (default), the FXS voice circuits will automatically select ground-start or loop-start signaling on a channel-by-channel basis according to the incoming T1 signal. See Table 8-2for all switch combina- tions.

TP Idle/Busy Switch

The fourth switch on each DIP switch, labeled TP Busy/Idle, selects whether the tip-ground relays are busy (closed) or idle (open) during trunk processing. The default is idle (switch 4 OFF).

To change signaling options, refer to Table 8-2and Figure 8-3. The numbered signaling options listed in Table 8-2are described in further detail in the next section.

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