SDM-9XXX Series Hardware Installation Guide
4-18 Memotec Inc.
NOTE: To interpret the status LEDs on these interface cards, refer to “Interface Card
Status LEDs” on page 4-27.
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
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 3-26.
Figure 4-11: The Dual FXS interface card (top), and Quad FXS interface card (bottom)
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