3Com MSR 30 manual Description of the LEDs on the IMA-4E1/IMA-8E1 panel, Attribute 75-ohm 120-ohm

132CHAPTER 3: MULTIFUNCTIONAL INTERFACE MODULES

Table 90 Interface attributes of the MIM-IMA-4E1/ MIM-IMA-8E1

	Description
	MIM-IM
	A-4E1
	(75-ohm MIM-IMA-8E1		MIM-IMA-4E1	MIM-IMA-8E1
Attribute	)	(75-ohm)	(120-ohm)	(120-ohm)

Cable type	75-ohm 4E1	75-ohm 8E1	120-ohm 4E1	120-ohm
	conversion cable	conversion cable	conversion cable	8E1
				conversio
				n cable
Max	500 m (1640.4 ft.)		150 m (492.1 ft.)
transmission
distance
Operating mode	ATM E1 independent link/IMA bundle mode
Supported	AAL5 (ATM adaptation layer 5)
service
Protocol	PPPoA, PPPoEoA, IPoA, IPoEoA
Service type	CBR/VBR-rt/VBR-nrt/UBR

Interface LEDs The following figures illustrate the MIM-IMA-4E1 and MIM-IMA-8E1 panels.

Figure 148 MIM-IMA-4E1 (75-ohm) panel

Figure 149 MIM-IMA-8E1 (75-ohm) panel

The LEDs on the MIM-IMA-4E1 panel have the same functionality as those on the

MIM-IMA-8E1 panel. The following table describes these LEDs.

Table 91 Description of the LEDs on the IMA-4E1/IMA-8E1 panel

LED	Description
LINK	OFF means no link is present; ON
	means a link is present.
ACT	OFF means no data is being
	transmitted or received. ON means
	data is being transmitted or received.

Interface Cable The MIM-IMA-4E1 module provides four E1 ports and uses a 120-ohm or 75-ohm 4E1 conversion cable. The two types of 4E1 conversion cables look similar. Both of them have a DB68 connector at one end for connecting the router. However, the