This device realizes 4E1/8E1+4Ethernet+customized services over fiber solution.

The 2xoptical ports are 2xSTM-1 optical port. It can be used for point-to-point, ring and chain transmission network.

• 1U 19inch design
• 2xSTM-1 for uplink
• Supports optical 1+1 protection, please use 2xSFP optical modules for 1+1, chain application or ring application.
• Supports Remote power Down Detection (RPD) and Auto Laser Shutdown (ALS)
• Supports E1 loop back, includes E1 loop to line side and E1 loop to device side. 
• HM-RS1030 provides an embedded BERT (Bit Error Ratio Tester) for maintenance

Optical	E1
Two optical with rate of 155.52Mbps Comply with ITU-T G.957 Optical: support SFP/LC, use155M typeNot offer SFP modules by default, please contact us if you need	8E1 With DB37 connector. DB37/BNC for 75ohm RJ45 for 120ohm Line code: HDB3
Ethernet	Customized services
4xEthernet offered Ethernet auto adapt 10/100M, full/half duplex Support MDI/MDIX With RJ45 connector MTU: support up to 1536/1552 bytes The 4xEthernet can be set VLAN or physically isolated by management.	There is 2xRJ45 type and 4xRJ45 type1xRJ45 available for below services:4xFXO/FXS, 4channel magnet phone, 1channel 2/4wire E&M, 2channel RS2322channel RS485 2channel 64K data
Management	Environment
Support CLI and SNMP management	Temperature: -5-50°C Humidity: -40~ 70%Non-condensing