3com MSR 20 Manual Do Utilizador

C

HAPTER

 3: M

ULTIFUNCTIONAL

 I

NTERFACE

 M

ODULES

■

For an ISDN U interface line, adapt the interface with an NT1 by inserting one 
end of the S/T interface cable into the S/T port on the NT1 and the other end to 
the BRI port on the MIM-4BSE.

■

For an ISDN S/T interface line, directly connect the cable to the BRI port on the 
MIM-4BSE.

1-port Single-Pair High-Speed Digital Subscriber Line module (MIM-1G.SHDSL) 
adopts the Trellis Coded Pulse Amplitude Modulation (TCPAM) approach and can 
provide the symmetric speed as high as 2.3 Mbps. Its transmission speed can 
automatically adapt to cable length and conditions. Compared with ADSL, 
G.SHDSL allows longer transmission distance and as such, can serve a wider range 
of applications. It can substitute for E1/T1 lines to provide high-speed data service 
access. However, as TCPAM uses the band starting from 0 Hz for data 
transmission, G.SHDSL cannot share the same line with POTS or ISDN just like 
what ADSL has done.

The MIM-1G.SHDSL module supports:

■

Manual G.SHDSL line activation/deactivation and easy-to-use fault isolation 
tools;

■

G.992.1 interface standard and auto-sensing.

The interface attributes of MIM-1G.SHDSL are given in the following table:

MIM-1G.SHDSL panel is shown in the following figure:

Figure 116   MIM-1G.SHDSL panel

The following table describes the LEDs on the MIM-1G.SHDSL panel:

Table 63   Interface attributes of MIM-1G.SHDSL module

Connector RJ11 

Number of connectors 

1 

Interface standard 

G.991.2 

Interface rate 

In single-pair mode, supports the 
sending/receiving independent 
symmetric speed in the range 192 
kbps to 2304 kbps, with the step 
length being 8 kbps. 

Cable Telephone 

cable 

Supported service 

G.SHDSL access over telephone lines