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DHODT-LMFE is a carrier-class, cost-effective, compact (only 1U high), STM-1/STM-4/STM-16 SDH/MSPP platform that is designed for application in metro and access networks to facilitate the efficient transport of traditional TDM and emerging data traffic for service providers.
DHODT-LMFE is a card based compact SDH equipment, designed mainly as a gateway node between the core SDH network and a number of remote CPE boxes. It may also be used as a multi service SDH ADM node in a typical ring or mesh network. The 1U high 19" wide chassis of the DHODT-LMFE has 8 slots, with 2 slots for the DC(1+1)/AC power supply, 1 slot for network management card, 1 slots for STM-1/STM-4/STM-16 uplink, and 4 slots left for services (STM-1, Ethernet, E1, E3/DS3,V.35 Etc.).
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*Support up to STM-16 rate SDH service
*Support 1+1 MSP, SNCP protection
*Ethernet service supporting GFP encapsulation, VC12 virtual concatenation (1~63 VC12) and LCAS
*Management channel can be DCC bytes or E1 (VC12)
*Inter-working with popular SDH/MSPP products of various vendors
*Easy commissioning and maintenance
*High integration, compact design
*High reliability, low CAPEX and OPEX
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General
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Network topology
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Star, line, ring
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Card number
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1 pc aggregation card, 4 pcs tributary cards, 1 pc network management card, 2 pcs power supply cards.
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Cross connection capacity:
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Aggregation:
STM-4: granularity at VC12, VC3 & VC4 level full cross of 16 STM-1 capacity; STM-1: granularity at VC4 level and its sub-container full cross of 10 STM-1 capacity.
Tributary:
Uplink: High order: VC3 & VC4 to aggregation card full cross of 2 VC4 capacity;
Low order: VC12 to aggregation card full cross of 2 VC-4 capacity;
Downlink: High order: VC3 & VC4 to aggregation card full cross of 2 VC4 capacity;
Low order: VC12 to aggregation card full cross of 2 VC-4 capacity;
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Cross connection direction:
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Group to tributary, tributary to group, group to group, tributary to tributary.
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Cross connection type:
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Single direction, dual direction, multicast/broadcast, loop back
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Optical protection:
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VC-12, VC-3, VC-4 support SNCP, protection time is less than 50ms, line multiplex segment 1+1 protection. STM-1dual fiber single direction multiplex segment protection.
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Power supply redundancy:
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Multiple redundancy protection, dual -48 power supply, two independent PWR card.
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Built-in network management channel:
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Standard DCC channel or VC-12, E1 channel, Ethernet channel and EOE Ethernet in-band management channel
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Inner function:
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Bult-in TUPP and cross connection function, standard SDH equipment clock units in aggregation card. Built-in E1 ber test unit in aggregation and tributary unit.
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Optical direction
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2 channels of uplink STM-1, full load 8 STM-1 optical tributary channels.
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Tributary service:
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12 or 24 channels of E1, 1 or 3 channels of E3/DS3, 1000M/100M/10M Ethernet electrical or optical service, 2 channels of V.35
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STM-1 Optical/Electrical Port
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Bit rate:
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155520kbit/s ± 4.6ppm
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Line code:
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Scrambled NRZ
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Wavelength:
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Default:
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1310nm
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Option /5:
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1550nm
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Output power:
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Default:
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Min: –12 dBm
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Option /L:
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Min: -5dBm
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Option /S:
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Min: –14 dBm
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Option /SL:
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Min: -5dBm
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Sensitivity:
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Default:
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-36dBm
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Option /S:
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-30dBm
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Connector:
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Optical:
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Default:
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SC dual fiber dual directions
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Option/S:
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SC single fiber dual directions
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Electrical:
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CC4
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STM-4 Optical Port
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Bit rate:
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622080kbit/s ± 4.6ppm
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Line code:
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Scrambled NRZ
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Wavelength:
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Default:
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1310nm
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Optional/5:
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1550 nm
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Output power:
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Default:
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Min: –12 dBm
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Sensitivity:
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Default:
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-28dBm
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Connector:
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Default:
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LC dual-fiber dual-direction transimission
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STM-16 Optical Port
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Bit rate:
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2488320kbit/s ± 4.6ppm
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Line code:
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Scrambled NRZ
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Wavelength:
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I-16:1310nm
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S-16.1:1310nm
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L-16.1:1310nm
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L-16.2:1550nm
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Output power:
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I-16:
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S-16. 1:
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L-16.1:
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L-16.2:
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-10~-3 dBm
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-5~0 dBm
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-2~+3dBm
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-2~+3dBm
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Sensitivity:
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I-16: <-18dBm
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S-16: <-18dBm
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L-16.1: <-27dBm
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L-16.2: <-28dBm
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Connector:
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Optical:
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Default:
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LC dual fiber dual directions
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Option/S:
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LC single fiber dual directions
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E1 port
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Bite rate:
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2.048 Mbps ± 50 ppm
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Line code:
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HDB3
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Impedance:
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75ohm unbalanced /120ohm balanced
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Frame:
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Unframed
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Connector:
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RJ45 or DMS-60
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E1 number:
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12 or 24
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E3/DS3 port
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Bite rate:
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E3: 34.368 Mbps ± 15ppm; DS3:44. 736 Mbps ± 15ppm
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Line code:
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HDB3
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Impedance:
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75ohm unbalanced
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Frame:
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Unframed
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Connector:
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CC4
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E3 number:
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1
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Ethernet port
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Bite rate:
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2M~100M
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Work mode:
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Ethernet Tx port: auto-negotiation, manual 100M full-duplex.
Ethernet Fx port: auto-negotiation, manual 100M full-duplex.
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Connector:
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Ethernet Tx port: RJ45
Ethernet Fx port: LC
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Support:
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VCAT, GFP, LCAS
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Frame length:
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Mini frame length 64 byte, Max frame length 1518
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Transmission way:
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EoS, EoE
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Channel number:
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1～4
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Port number:
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1～4
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V.35 port
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Bite rate:
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Nx64kbps ± 50 ppm,N£31 or 2048 kbps
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Frame:
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Framed E1 or unframed
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Interface mode:
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DCE or DTE
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Interface number:
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2
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Connector:
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DB25
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Clock Port
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Clock resource:
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Inner clock, STM-1 line clock, external input clock, tributary clock
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External clock input:
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One 2048kbit/s or 2048kHz external clock, 75ohm unbalanced coaxial socket or 120ohm balanced RJ45 socket
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Clock output:
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One 2048kbit/s or 2048kHz clock, 75ohm unbalanced coaxial socket or 120ohm balanced RJ45 socket
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Connector:
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LA01card CC4 or RJ45 socket
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Management Port
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Ethernet Q interface:
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2 RJ45 port, SNMP, 10/100Base-T Etherent MDI port
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F interface (RS232):
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Baud rate :9600, 8 digital bits, 1 stop bit, no checkout, no flowcontrol
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OW/Overhead port
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Wire-order port:
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RJ11, support dual tone frequency dialing
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Asynchronous RS232 port
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DB9, V.11 electrical interface
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Mechanical/Electrical
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Dimension:
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44mm x 280mm x 440mm (H/D/W)
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Net weight:
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3.5kg
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Power:
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-48 V (-36V ~ -72V)
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Consumption:
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≤ 40W
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Working temp:
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0 ~ 45°C
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Humidity:
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0-90%RH (Non-condensing)
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Reference Standards
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Item
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Reference standard
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STM-1、STM-4 SDH optical port:
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G.957, frame structure G.707
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E1/E3/DS3 port:
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G.703,G.704
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Ethernet port:
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IEEE 802.3 relevant
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2Mbit/s、2Mhz clock port:
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G.823
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SDH clock:
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G.813, G.825, Ministry of Posts and Telecommunication: YDN121-1999, YDN123-1999
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Network structure:
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G.783, G.798, G.803, G.805
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Monitor and management:
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G.784, G.831, Q.811, Q.812, M.3100, M.3000, Ministry of Posts and Telecommunication: YDN037-1997, YDN045-1997, YD5080-99
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Service protection:
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G.841, G.842, Ministry of Posts and Telecommunication: YDN028-1997
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Built-in E1 Ber test:
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O.150
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