Dip Switch - 3Com 3C13886 - Router OC-3 ATM SML Flexible Interface Card Installation Manual

3Com Router Module Guide
Table 2-9 Interface attributes of ROUTER 1-PORT FRACTIONAL E1 SIC
Attribute
Connector type
Number of connectors
Interface standard
Interface rate
Cable type
Operating mode
Supported service

2.4.4 DIP Switch

E1/cE1/PRI interface is compatible with both 75-ohm impedance and 120-ohm
impedance. The interface matches different types of impedance through an 8BIT DIP
switch. By default, all the 8 positions of the DIP switch are ON, as shown in the
following figure:
DB15
1
G.703, G.704
2.048Mbps
75-ohm non-balanced coaxial cable (DB15 to BNC)
120-ohm balanced twisted-pair cable (DB15 to RJ-45)
Coaxial connector, network interface connector and 75-ohm to 120-ohm
adapter
E1
cE1, ISDN PRI (supported by SIC-EPRI only )
FE1(supported by ROUTER 1-PORT FRACTIONAL E1 SIC only)
Backup
Terminal access
ISDN (supported by SIC-EPRI only)
2-14
Chapter 2 Smart Interface Cards
Description