Multi-service SDH STM-1 Add Drop Multiplexer

The STM-1 add & drop multiplexer delivers bonded E1 lines, Ethernet services and V.35links over legacy SDH networks. Installed at the customer site or directly on  STM-1 access ring, ESDH155ADM leverages the SDH infrastructure for LAN connectivity and Internet access, while providing leased line services to end users. Moreover, interoperating with EZWELL ESDH-MSAP and ESDH155TM series, ESDH155ADM offers an innovative and competitive solution to reduce OPEX and CAPEX for carriers or ISPs.

The Ethernet frames are encapsulated in SDH frame by using GFP (Generic Frame Protocol) and transported through the SDH network in a VC-12 group, configuring the bandwidth of IP channel in increments of 2Mbps. ESDH155ADM introduces LCAS technology and VCAT technology to benefit the SDH network to better fit busty data traffic. Each Ethernet module groom up to two WANs, aggregating two direction Ethernet services into SDH networks. The PDH traffic and V.35 traffic are mapped into the SDH frame; enabling E1 and V.35 link to support cross connection, and can be terminated at any point on the network.

Two management methods are available: CONSOLE and SNMP. The EZWELL EMS network management system supports remote configuration and monitoring, reducing operating expenses, eliminating technical visit and maximizing network performance and uptime.

§          SDH Add & Drop Multiplexer with 155Mbps data rate

§          Provide 2×STM-1 uplink interface with standard optical fiber

§          Supports two operation modes toward the network: two independent STM-1 links (no protection) with total connection capacity is 63 timeslot (one STM-1); and dual-link operation with 1+1 single-ended multiplex section protection (unidirectional protection), with automatic protection switching (1+1 APS protection)

§          Support flexible topologies such as point-to-point, chain or ring network

§          Offer various tributary interfaces: E1 interface, Ethernet interface and V.35 interface

§          Provide 1×64K RS232 data channel and 1×Order Wire port

§          Provide up to 16×E1 interface is compliant with ITU-T G.703 standard, unframed 2.048 Mbps data streams

§          Provides 4×10/100BASE-TX Ethernet interface, all four LAN ports connected to a full-function internal Layer 2 Ethernet switch, supports 802.1q VLAN tag, 802.1p Class of Services function, and 802.3x-based traffic control function

§          Support low-order virtual concatenation for transporting the LAN traffic over SDH, traffic from any LAN port can be mapped over a virtually concatenated group using up to 63 VC-12s

§          Adopt VCAT, GFP encapsulation per ITU-T Rec. G.7041, and LCAS per ITU-T Rec. G.7042, with maximum bandwidth 100M

§          Provide 2×V.35 interfaces, support all of clock mode both DTE or DCE

§          Provides loop-back function to diagnose link status for each E1 channel and V.35 channel

§          Inbuilt BER tester for E1 and V.35 links

§          Comply with ITU-T rec. for management interface

§          Support local and remote firmware update and easy to maintain

§          Compact structure with 1U×19inch

§          Optional -48V DC or 220V AC power supply

Specification:

• STM-1o (STM-1 optical) signal as per ITU-T G.957, G.958

• Wave length:1310nm,1550nm,850nm

• Transmission distance: up to 120km

•           Connector: FC/SC/ST selectable

• Line code: 1B1H

• Data rate: 155520kbit/s

• Optical fiber: single mode or multi-mode

• Line Rate: 2048kbps ± 50ppm

• Line Code: HDB3

• Line Impedance: 75ohm unbalanced or 120ohm balanced optional

• Electrical Characteristic: comply with ITU-T G.703 recommendation

• Jitter Performance: comply with ITU-T G.823 recommendation

• Line Attenuation: 0~6dB

• Electrical Level: ±2.37V±10% or ±3.00V±10%

• Connector: 75Ω unbalanced with BNC or 120Ω balanced with RJ45; DB37 male (for 8/16 line E1)