3com MSR 20 Manual Do Utilizador

C

HAPTER

 3: M

ULTIFUNCTIONAL

 I

NTERFACE

 M

ODULES

MIM-1CT3 and MIM-1CE3 use the same type of interface cables and make 
connection in the same way. For details, see “MIM-1CE3 Module” on page 97.

n

MIM-4BSE, the four-port ISDN BRI interface module, transmits, receives, and 
processes four channels of ISDN BRI S/T data traffic on ISDN BRI S/T interfaces.

The MIM-4BSE differs from the 4BS only in the way they set matched resistance 
for an ISDN BRI S/T interface: the 4BS uses jumpers while the MIM-4BSE uses DIP 
switches.

The MIM-4BSE can work in dial mode or leased line mode.

The following table describes the interface attributes of the MIM-4BSE.

Table 59   Description of the LEDs on the MIM-1CT3 panel

LINK/ACT 

ON means the carrier signal has been 
received.

OFF means no carrier signal has been 
received.

Blinking means data is being 
transmitted or/and received. 

LP/AL 

ON means the interface is in a 
loopback.

Blinking means an AIS, LFA, or RAI 
alarm signal is present.

OFF means no loopback or alarm is 
present. 

AIS = Alarm indication signal; LFA = loss of frame alignment; RAI = Remote alarm indication

Table 60   Interface attributes of the MIM-4BSE

Connector RJ-45 

Number of connectors 

4 

Cable 

ISDN S/T cable 

Protocol & standard 

ITU-T I.430, Q.921, Q.931 

Operating mode 

ISDN dial-up

ISDN leased line