Model Number

HC-DM3721

HC-DM3721

Overview

HC-DM3721 is a compact SDH device with STM-1 interface. It can connect with any standard STM-1 optical port, connect to the metro network directly and build point to point network. 8×E1 lines, 2×100Base-T Ethernet service can be supplied.

HC-DM3721 can work as terminal equipment in the point to point network. It is mainly used in access layer network to supply various services such as STM-1, Ethernet typical applications include big client access, 3G mobile station connection and etc.

Feature

Standard STM-1 optical ports, 1+1 protection supported, dual or single fiber WDM transmission, different wavelengths and powers can be selected.

Standard SDH mapping of various service interfaces.

Ethernet mapping adopts GFP/VC-12 virtual concatenated technology, Laps and PPP/HDLC protocol.

Comply with ITU-T G .703

E1 port has on-line error surveillance and loop back test function；

NM port for management

Standard 19 inch 1 U

Both supply -48V DC and 220V AC

Can be configured or managed by CLI, DIP switch or HCView NM software

Specification

STM-1 interface

Data rate: 155.520Mbps

Connector: FC

E1 interface

Comply with ITU-T G.703

Rate: 2048Kbps±50ppm

Code: HDB3

Impedance: 75Ω

Connector: SMB

LAN interface

IEEE802.3/802.3u completely compatible

Interface rate: 10/100Mbps self-adaptive

Connector: RJ45

The bridge connects function:

256 frame buffer

Automatic self-study and refresh MAC address (1024)

Rate: 10/100Mbps

Support MDI/ MDIX function

The management connector (serial interface)

Baud rate: 9000

Connector: RJ45

Others

Both supply 220V AC（165～240V）and -48V DC（-36～-72V）

Dissipation: <10W

Dimension: 19” 1U

Environment

Working Temperature: -5°C~+45°C

Store Temperature: -20°C~+70°C

Relative humidity: 5%～90% no coagulation

Ordering Information

	Optical connector	Transmit Distance	E1 connector	Ethernet connector	Power Supply	Remark
HC-DM3721	SC	20Km	SMB	RJ45	Both 220v AC and -48V DC
	FC	40Km
	ST	80KM
		120Km