Specifications

Chapter 1 Installation
1-13
TP Busy/Idle Switch
Trunk Processing can be selected as Idle or Busy. Trunk Processing occurs when the T1 line is in an
alarm (not operational) state. An Idle (off) selection of this switch will cause all 12 FXS Tip Ground
Relays to be open during a T1 alarm or reset period. A Busy (on) selection will cause all 12 FXS Tip
Ground Relays to be closed during a T1 alarm or reset period. The Trunk Processing Busy selection is
recommended for Loop Start (if the PBX or terminal device detects loop current) operation or Ground
Start cases where the PBX has the ability to reroute calls to different trunks when the T1 is down.
This switch must also be set in the Busy position when using the T1 Control Switch #7 for Test Tones.
Signaling Options A, B, C
These DIP switch settings control the FXS-12 Channel Card signaling during normal call operation with
signaling options available as follows:
Normal FXO switch to FXS Access Bank A/B signaling
Access Bank FXS interfaces automatically adapt to Loop-Start or Ground-Start signaling coming from the
T1 line on a channel-by-channel basis.
Wink Delay is selected to translate two-state wink start signaling toward the T1 network to a FXS
ringing with delayed wink for proceed-to-send digit indication. When an incoming seizure from the T1
network is detected, the FXS channel has ringing voltage applied. When the attached equipment answers
by closing the loop, the Access Bank will wink the network for proceed to send, allowing DTMF digits
carrying Automatic Number Identification (ANI) or Directory Number Identification Service (DNIS) to be
received by the attached equipment. This is particularly useful for voice mail, voice response, call
distribution, and automatic attendant applications. Standard loop-start PC voice mail and fax cards can be
used for ANI and DNIS applications, without the expense and complication of signaling converters.
Switch Settings( See Summary Table Below):
Normal FXS Signaling (Either Loop or Ground-Start)
Access Bank FXS interfaces automatically adapt to Loop-Start or Ground-Start signaling coming from the
T1 line on a channel-by-channel basis.
Order FXS Loop or Ground Start Signaling from your Carrier
Switch Option A Off
Switch Option B Off
Switch Option C Off
E & M Wink-Start to Loop-Start Conversion (AT&T Megacom, Flexpath, etc.) with Calling Party
Disconnect
Access Bank FXS interfaces provide Plain Old Telephone (POTS) Loop-Start interfaces to a phone system
or regular telephones. E&M wink-start signaling and per-channel ringback tones are provided to the T1
line.
Calling Party Disconnect is a two second Tip Open condition (loop current turns off) at the FXS when the
network releases seizure (the far-end call hangs up). Battery feed from the FXS returns to normal idle
(Tip grounded) after the two second disconnect. This feature is similar to local telephone service Calling
Party Disconnect (CPD), provided by some central office equipment for answering machines and PBXs