Carrier Access SNMP 8.3 Signaling Types

FXS-ID Configuration

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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 contai ns 12 test switc hes

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

Select the default setting to have Access Bank II - SNMP FXS in te rf ace s 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 tha t in this configuration, the Caller ID CLASS fe ature

can only be supported if the FXD voice card in the CO also supports this feature.

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 ringin g st at e of t he 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.