Installation guide

Connecting WAN and Voice Interface Cards to a Network 3-23
Voice Interface Cards
If you have additional cards to install, proceed to the appropriate section(s) in this manual.
When you have finished all installations, see the software configuration guide that shipped
with your hardware.
Voice Interface Cards
Voice network modules convert telephone voice signals into a form that can be transmitted
over an IP network, and have no connectors. Voice interface cards provide the connection
to the telephone equipment or network.
This section contains the following topics:
• 2-Port FXS Card on page 3-23
• 2-Port FXO Card on page 3-25
• 2-Port E&M Card on page 3-27
• 2-Port FXS, FXO, and E&M Card LEDs on page 3-29
• 2-Port ISDN BRI Card on page 3-30
2-Port FXS Card
A Foreign Exchange Station (FXS) interface connects directly to a standard telephone, fax
machine, or similar device. This interface supplies ringing voltage, dial tone, and so on to
the station. The ports are shown in Figure 3-22.
Loopback
button
Push this button to place the WAN
interface card into loopback mode. The
service provider can send a signal to
test the connection from your site to the
central office switch.
Push this button again to turn loopback
mode off.
Table 3-5 T1/FT1 Card LEDs and Button (continued)
Feature Color Description