H3C Technologies H3C MSR 50 - Manual (Page 144)

3-40
Description
Attribute
MIM-8E1/MIM-8E1-F module (75-ohm)
MIM-8E1/MIM-8E1-F module
(120-ohm)
Number of connectors 1
Interface standard G.703
Interface rate 2.048 Mbps
Cable type 75-ohm 8E1 conversion cable 120-ohm 8E1 conversion cable
Cable characteristic
impedance
75-ohm 120-ohm
Operating mode
E1, CE1, ISDN PRI (only supported by MIM-8E1)
FE1 (only supported by MIM-8E1-F)
Supported service
z
Backup
z
Terminal access service
z
ISDN PRI (only supported by MIM-8E1)
Interface LEDs
MIM-8E1 and MIM-8E1-F panels are similar. The following figures illustrate MIM-8E1 panels.
Figure 3-44 MIM-8E1 (120-ohm) panel
Figure 3-45 MIM-8E1 (75-ohm) panel
The following table describes the LEDs on the MIM-8E1/MIM-8E1-F panel:
Table 3-35 Description of the LEDs on the MIM-8E1/MIM-8E1-F panel
LED Description
LINK
z OFF means no link is present;
z
ON means a link is present.
ACTIVE
z
OFF means no data is being transmitted or received.
z
ON means data is being transmitted or received.
Interface cable
The MIM-8E1/MIM-8E1-F module provides eight E1 ports and adopts a 120-ohm or a 75-ohm 8E1
conversion cable. The two types of cables look similar. Both of them have a DB-68 connector at one end
for connecting the router. At the other end, however, the 75-ohm 8E1 conversion cable provides 16
coaxial cable connectors; and the 120-ohm 8E1 conversion cable provides eight twisted pair cable
connectors, as shown in the following figures: