Carrier Access SNMP manual Signaling Types, FXO Switch to AB2 FXS A/B Signaling

FXS-ID Configuration

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

8.3.1FXO 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.

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