Specifications

Chapter 1 Installation
1-15
immediately after incoming seizure. The 200 ms outgoing wink "proceed-to-send" signal is not sent to
the T1 network until 800 ms after FXS ringing voltage has been tripped (answered). Thus the voice mail
or PBX DTMF or MF register has at least 1 second to be attached to the line after closing the loop. The
network will then proceed to automatically send 4 to 10 ANI or DNIS digits.
User also receives 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 which
are equipped to detect loss of loop current on their line interfaces. This loss of loop current informs the
equipment to disconnect the call.
This signaling not available in this release.
Option A Switch On
Option B Switch Off
Option C Switch On
Wink-Start ANI/DNIS to Ground-Start Conversion (Not available in release 1 and 2)
Access Bank FXS interfaces provide Ground-Start interfaces to a voice mail or phone system. E&M
wink-start signaling and per-channel ringback tones are provided to the T1 line. Ringing voltage is
applied immediately after incoming seizure. The 200 ms outgoing wink "proceed-to-send" signal is not
sent to the T1 network until 800 ms after FXS ringing voltage has been tripped (answered). Thus the
voice mail or PBX DTMF or MF register has at least 1 second to be attached to the line after closing the
loop. The network will then proceed to automatically send 4 to 10 ANI or DNIS digits.
Option A Switch Off
Option B Switch On
Option C Switch On
Customized Signaling
Carrier Access can provide customized signaling options for your use. Signaling can include any of the
above options plus others. Some possibilities are:
Answer Supervision wink
An answer supervision wink is in the form of a 200 ms Tip Open condition (loop current turns off) from
the Access Bank to the voice-mail or phone system when the far end goes off hook (answers the call).
Battery feed from the FXS returns to normal (Tip grounded) after the 200 ms disconnect. This feature is
useful if the calling party switch needs to know when the far end has answered the call.
Table 2.5 FXS Signaling Summary
Option A
Switch
Option B
Switch
Option C
Switch
Signaling
0 Off Off Off Normal FXS A&B Signaling for Loop or Ground Start - Automatic
Selection based on Carrier Signaling
1 On Off Off E&M Wink Start to Loop Start Conversion with Ringback to T1
(Megacom
R
) and Calling Party Disconnect (1&2)
2 Off On Off E&M Wink Start to Ground Start Conversion with Ringback to T1
(Megacom
R
) (1)
3 On On Off E&M Immediate Start to Loop Start Conversion with ringback to T1