1 
SIC/DSIC 
MSR  series routers use modular design and support a wide range of SICs and DSICs. A SIC 
occupies one SIC slot and a DSIC occupies two SIC slots. The SIC/DSIC series interface modules 
provide interfaces such as synchronous/asynchronous serial interface, Ethernet interface, E1/T1, 
ISDN BRI/PRI, ADSL, audio interface, and Layer 2 switching interface.  
Among this series interface modules, the Layer 2 switching interface modules (SIC-4FSW and 
DSIC-9FSW) each have a corresponding PoE-capable module. The module can provide -48 VDC 
power to remote powered devices (PDs, such as IP phone, WLAN AP, network camera) through 
straight-through cables if it is installed in a PoE router. 
Ethernet switching module 
•  SIC-4FSW 
•  SIC-4FSW-PoE 
•  DSIC-9FSW 
•  DSIC-9FSW-PoE 
•  SIC-4GSW 
•  SIC-4GSW-PoE 
•  SIC-4GSWF 
SIC-4FSW/SIC-4FSW-PoE/DSIC-9FSW/DSIC-9FSW-PoE 
Introduction 
The  4/9-port 10/100 Mbps Ethernet Layer 2 interface modules SIC-4FSW/SIC-4FSW-PoE and 
DSIC-9FSW/DSIC-9FSW-PoE can provide up to 4/9 10/100 Base-Tx Ethernet ports for Layer 2 and 
Layer 3 switching. A router installed with SIC-4FSW/DSIC-9FSW modules can work as a 
switching/routing integrated device on a small-sized enterprise network to connect PCs and network 
devices inside the network. The SIC-4FSW-PoE/DSIC-9FSW-PoE interface modules can supply 
power to powered devices (PDs) through power over Ethernet (PoE). 
Interface specifications 
Table 1 Interface specifications 
Item 
Connector  RJ-45 
Interface type  MDI/MDIX 
Number of 
connectors 
Four 100 Mbps RJ-45 connectors  Nine 100 Mbps RJ-45 connectors 
Transmission 
distance 
100 m (328.08 ft) over category-5 twisted pair cables (both crossover and 
straight-through) 
Operating mode  10/100 Mbps autosensing, full/half duplex