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
Table 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
28