Carrier Access Access Bank II SNMP - Manual (Page 75)

FXS-ID Configuration
8-2 9/24/01
plate of the FXS-ID card has 12 channel status LEDs and one 4-position DIP switch for selecting
from a number of different signaling types. Furthermore, the back plate also contains 12 test switches
that can be used to “busy out” each channel individually. On the FXS-ID card itself, each individual
channel has a 6-position DIP switch for setting transmit and receive line attenuation.
When equipped with the Foreign Exchange Station - Caller ID (FXS-ID) voice card, the Access
Bank II - SNMP can support a number of popular signaling types used by dedicated T1-accessed
voice service providers, including:
• AT&T Megacom

(E&M Wink-Start)
• NYNEX Flexpath
“
(E&M Wink-Start)
• US West DSS
“
• Long-distance Automatic Number Identification (ANI) and Dialed Number Identifica-
tion Service (DNIS) from MCI, Sprint, LDDS, and Wiltel.
The FXS circuits automatically perform impedance matching (not to be confused with DS-1 ALBO)
to adapt to various PBXs, key systems, telephones and line lengths.
8.3 Signaling Types
The FXS-ID voice card can be configured, using DIP switches on the card, to support the following
common signaling types:
• FXO in the Central Office (CO)-to-AB2 FXS A/B Signaling (regular 3-state FXS signal-
ing)
• E&M Immediate Start to Loop-Start/Ground-Start
• Wink-Start to Loop-Start/Ground-Start
• Wink Delay (ANI/DNIS) for Loop-Start/Ground-Start
8.3.1 FXO Switch to AB2 FXS A/B Signaling
Select the default setting to have Access Bank II - SNMP FXS interfaces automatically adapt to loop-
start or ground-start signals received from the incoming T1 line on a channel-by-channel basis. This
option is used when an FXO voice card is in the Central Office, at the other end of the T1 link oppo-
site the FXS-ID card. It is important to note that in this configuration, the Caller ID CLASS feature
can only be supported if the FXD voice card in the CO also supports this feature.
8.3.2 Wink-Start to Loop-Start or Ground-Start
Select Wink-Start to Loop-Start or Ground-Start to translate two-state wink-start signaling from the
T1 network (AT&T Megacom, Flexpath, etc.) to loop-start or ground-start ringing at the FXS inter-
face. Ringback tone is supplied on the T1 transmit path during the ringing state of the FXS. This con-
figuration options all 12 FXS channels to appear as E&M wink-start channels to the serving carrier
switch, while providing the customer with standard dial tone/ringing telephone line connections.