Carrier Access Access Bank II SNMP - Manual (Page 80)

FXS Signaling Option Descriptions
9/24/01 8-7
Figure 8-3: FXS Signaling Options
8.6 FXS Signaling Option Descriptions
8.6.1 Option Switches A, B, and C
Signaling options selected by the A, B, and C option switches are discussed below according to the
numbered sequence from 0 to 7 in Table 8-2.
8.6.1.1 Option 0. Normal FXS A&B Signaling, Loop-Start or Ground-Start
With this selection, the Access Bank II - SNMP FXS interfaces automatically adapt to loop-start or
ground-start signaling received from the T1 line on a channel-by-channel basis. When using this
option, order FXS loop-start or FXS ground-start signaling from your service provider.
8.6.1.2 Option 1. E&M Wink-Start-to-Loop-Start Conversion with Calling Party
Disconnect
The FXS-ID voice card provides Plain Old Telephone (POTS) loop-start interfaces to a PBX or regu-
lar telephones. E&M wink-start signaling and per-channel ringback tones are sent to the T1 line.
Calling Party Disconnect
Calling Party Disconnect (CDD) is a 2-second, tip-open condition at the FXS-ID when the network
releases seizure (the far-end called party hangs up). The battery feed from the FXS-ID returns to idle
(tip grounded) after the two-second disconnect. This feature is similar to local telephone service Call-
ing Party Disconnect (CPD), which some Central Office equipment provides for answering machines
and PBXs equipped to detect loss of loop current on their line interfaces. This loss of loop current
Switch A Switch B Switch C
OFF OFF OFF
Switch A Switch B Switch C
ON OFF OFF
Signaling Options
& Busy/Idle Signaling Options
& Busy/Idle