3Com MSR 50, MSR 30, MSR 20 manual Jumper settings of the FIC-4BSE example

182CHAPTER 4: FLEXIBLE INTERFACE CARDS

Table 126 Interface attributes of the FIC-4BSE

Attribute	Description
Cable	ISDN S/T cable
Protocol & standard	ITU-T I.430, Q.921, Q.931
Operating mode	ISDN dial-up
	ISDN leased line
Supported service	ISDN
	ISDN supplementary services
	Multi-user number
	Sub-addressing
	Backup

Jumper Settings The FIC-4BSE uses jumpers to set matched resistance for ISDN BRI S/T interfaces. The use of 100-ohm resistance on an ISDN BRI S/T interface depends on jumper settings. The following figure shows the jumper settings, where all the ISDN BRI S/T interfaces are using 100-ohm resistance.

Figure 224 Jumper settings of the FIC-4BSE (example)

S1

S4

S5

S7

S2

S3

S6

S8

0 1 2 3

The following table describes how to set jumpers.