3Com MSR 30, MSR 20, MSR 50 manual SIC-1VE1, Signals, Configure a VPM based on voice traffic, Card

SIC-1VE1 45

Step 2: Check the status of LINK LED on the GEC panel: ON means the link is connected and OFF means the link is not connected. In the latter case, check the line.

SIC-1VE1

Introduction 1-port E1 voice interface card (SIC-1VE1) can handle dense voice signals in VoIP

	system. It provides a CE1/PRI/R2 port, allowing the access of 30 channels of voice
	signals.
n	■ When purchasing a SIC-1VE1 interface card, users should purchase a VCPM
	and configure a VPM based on voice traffic.
	■ No VCPM is required, but only a VPM needs to be installed on the main board
	when MSR 20-1x series routers need to be equipped with a SIC-1VE1 interface
	card.
	■ VCPM and VPM need to be installed on the main board when MSR 30 series
	routers need to be equipped with a SIC-1VE1 interface card.
	■ VCPM and VPM need to be installed on the MSCA card when MSR 50 series
	routers need to be equipped with a SIC-1VE1 interface card.
Interface Attributes	Table 20 Interface Attributes of the SIC-1VE1
	Attribute	Description
	Connector	DB 15
	Number of connector	1
	Interface standard	G.703, G.704
	Interface rate	2.048 Mbps
	Frame format	Ethernet_II
		Ethernet_SNAP
		IEEE 802.2
		IEEE 802.3
	Cable type	75-ohm non-balanced coaxial cable
		120-ohm balanced twisted pair cable
		Coaxial connector, network interface
		connector and 75-ohm to 120-ohm
		adapter (with BNC connector)
	Operation mode	CE1
		ISDN PRI (only supported by SIC-1VE1)
		R2
	Services	Backup
		Terminal access
		ISDN (only supported by SIC-1VE1)

DIP Switches CE1/PRI/R2 interface is compatible with 75-ohm and 120-ohm impedance. Matching of different impedance is implemented through an 8BIT DIP switch. By default, all the DIP switches are set to ON, as illustrated in the following figure: