Comtech EF Data SDM-9220 - Manual (Page 92)

SDM-9220/9230 Hardware Installation Guide
5-14 Memotec Inc.
• Up to 2 FXS interface cards can be installed in the SDM-9220, or 3 in the SDM-
9230, providing up to 12 analog FXS voice ports in a single unit.
NOTE: To interpret the status LEDs on these interface cards, refer to “Interface Card
Status LEDs” on page 5-23 .
CAUTION:
:
Use a two-wire cable for FXS connections. In rare
circumstances, your telephone or fax may not work if you use a four-
wire cable. Should this occur, replace the four-wire cable with a two-
wire cable. If the problem persists, contact Technical Support.
NOTE: You must install a ferrite on each cable connected to an FXS port on an
SDM-9220 UAC or SDM-9230 UAC installed in the European Union or
Russia. These ferrites are
not
provided with the product package. For
instructions, turn to “Installing the Ferrites (EMI Filters)” on page 4-26 .
Figure 5-5: The Dual FXS interface card (top)
Figure 5-6: The Quad FXS interface card (bottom)