Carrier Access Access Bank II SNMP - Manual (Page 79)

FXS-ID Configuration
8-6 9/24/01
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 8-2 for 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 8-2 and Figure 8-3. The numbered signaling options listed
in Table 8-2 are described in further detail in the next section.
4 OFF OFF ON E&M immediate-start-to-ground-start
conversion with ringback to T1 line
(Megacom, Note 1).
5 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).
6 OFF ON ON Wink-start-to-ground-start conversion
with ANI/DNIS with 800 ms wink delay
(Notes 1 and 3).
7 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.