Faceplate and LEDs Figure 14 illustrates the faceplate of the 4-port E1/CE1/PRI module.
Figure 14 Faceplate of the 4-Port E1/CE1/PRI Module
Tab le 19 lists the status descriptions of the 4-port E1/CE1/PRI module LEDs.
Conversion Cables The 4-port E1/CE1/PRI module uses two types of 1-to-4 conversion cables, the
120-ohm 4E1 conversion cable and the 75-ohm 4E1 conversion cable. At one end
of both these cables is the DB-25 connector that connects to the router. At the
other end are 4 DB-15 connectors that connect to E1 cables. You can distinguish
these two types of cables by the main labels. The 120-ohm 4E1 conversion cable
bears the label, 4E1-120Ohm-CAB and the 75-ohm 4E1 conversion cable bears
the label, 4E1-75Ohm-CAB. The 75-ohm 4E1 conversion cable uses 8-core coaxial
cables but a 120-ohm 4E1 conversion cable uses 4 twisted pair cables.
Both the 75-ohm 4E1 conversion cable and the 120-ohm 4E1 conversion cable are
provided with the 4-port E1/CE1/PRI module but the E1 cable is optional so you
must order it when you order your 4-port E1/CE1/PRI module.
Figure 15 illustrates the 120-ohm 4E1 conversion cable and Figure 16 illustrates
the 75-ohm 4E1 conversion cable.
Services supported 1) Backup
2) Terminal access service
3) ISDN PRI
Table 18 Features of the 4-Port E1/CE1/PRI Module (continued)
Table 19 4-Port E1/CE1/PRI Module LEDs
LED Meaning
LINK Off: The link is not connected.
Green: The link is connected.
ACTIVE Off: No data is being transceived.
Green: Data is being transceived.
3Com Router Release Notes for V1.20
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