3com MSR 20 Manual Do Utilizador

The 1-port dual-pair G.SHDSL interface card (FIC-1SHL-4W) provides a four-wire 
G.SHDSL interface. It adopts TCPAM coding and provides symmetric rates up to 
4.624 Mbps. The transmission rate of the interface can automatically adapt to line 
distances and conditions.

Compared with ADSL, G.SHDSL allows farther transmission distance and thus has 
a wider application scope. It is an alternative to E1/T1 line for 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 like what 
ADSL has done.

The FIC-1SHL-4W has these features:

■

Supporting manual G.SHDSL line activation/deactivation and easy-to-use fault 
location tools.

■

Supporting G.992.1 interface standard and auto-sensing.

■

Allowing you to set the dual-pair G.SHDSL interface to operate in dual-pair or 
single-pair mode.

The following figure illustrates the FIC-1SHL-4W panel:

Figure 266   FIC-1SHL-4W panel

Table 161   Interface attributes of the FIC-1SHL-4W

Connector RJ-11 

Number of connectors 

1 

Interface standard 

ITU-T G991.2

ITU-T G994.1 handshaking 

Interface rate 

In single-pair mode, supports the 
sending/receiving independent 
symmetric rates in the range from 192 
kbps to 2312 kbps in steps of 8 kbps.

In dual-pair mode, supports the 
sending/receiving independent 
symmetric rates in the range from 384 
kbps to 4624 kbps in steps of 16 kbps. 

Interface cable 

Tailor-made 4-wire telephone cable 

Supported services 

G.SHDSL over ordinary telephone lines