38
C
HAPTER
2: I
NSTALLATION
Connecting to the Four-Port IMA Module
S330 only
The optional four-port IMA module provides four additional T1/E1 ports. You can
connect up to four T1/E1 lines to this interface and combine them to form a
logical, inverse-multiplexed high-speed link. You make connections to the
four-port IMA module in the same way that you make connections to the standard
PathBuilder S330/S310 T1/E1 UNI with IMA interface. For details, see “Connecting
to the T1/E1 UNI Interface” earlier in this chapter.
For connector pinouts, see “T1/E1 UNI with IMA Interface Connector Pinouts” in
Appendix A.
In addition to the common LEDs described earlier in this chapter, the following
LEDs indicate the status of the four-port IMA module’s T1/E1 ports. (See
Figure 34).
■
ALRT
— Indicates that an alarm is present on the port
■
ACT
— Indicates that the port is active
Figure 34
Four-Port IMA Module LEDs
Expansion slot 9 shares the same queue (queue 1) as the group 1 IMA UNI;
therefore, if an expansion module (DS3/E3 UNI or four-port IMA) is installed in
slot 9, the system deletes group 1 and all corresponding virtual circuits on startup
and generates an information only alarm. Furthermore, you cannot add group 1 if
an expansion module is installed in slot 9—either in the chassis or in the database.
If you enter a card type for slot 9 via the List Card menu, group 1 and the
corresponding virtual circuits are not deleted until the system is restarted.
ALRT
ACT
LINE
5 6 7 8
