Telecom products

SDH is (Synchronous Digital Hierarchy)

are standardized multiplexing protocols that transfer multiple digital bit streams over optical fiber using lasers or light-emitting diodes (LEDs). Lower data rates can also be transferred via an electrical interface. The method was developed to replace the Plesiochronous Digital Hierarchy (PDH) system for transporting larger amounts of telephone calls and data traffic over the same fiber without synchronization problems

SDH (and its American variant- SONET) emerged from standard bodies somewhere around 1990.
these two standards create a revolution in the communication networks based on optical fibers ,
in their cost and performance.

The basic unit of transmission

The basic unit of framing in SDH is a STM-1 (Synchronous Transport Module, level 1), which operates at 155.52 megabits per second (Mbit/s). SONET refers to this basic unit as an STS-3c (Synchronous Transport Signal 3, concatenated) or OC-3c, depending on whether the signal is carried electrically (STS) or optically (OC), but its high-level functionality, frame size, and bit-rate are the same as STM-1.

SONET offers an additional basic unit of transmission, the STS-1 (Synchronous Transport Signal 1) or OC-1, operating at 51.84 Mbit/s—exactly one third of an STM-1/STS-3c/OC-3c carrier. This speed is dictated by the bandwidth requirements for PCM-encoded telephonic voice signals: at this rate, an STS-1/OC-1 circuit can carry the bandwidth equivalent of a standard DS-3 channel, which can carry 672 64-kbit/s voice channels.^[3] In SONET, the STS-3c/OC-3c signal is composed of three multiplexed STS-1 signals; the STS-3C/OC-3c may be carried on an OC-3 signal. Some manufacturers also support the SDH equivalent of the STS-1/OC-1, known as STM-0

STM-16 SDH multiplexer MSPP Optical Transport Equipment STM-4 STM-1:H9MO-LMXE
Description
 
SDH/MSPP
 
Introduce
 

Overview
As a key member of FastFOM "MetroEdge-Express" SDH/MSPP Product family, H9MO-LMXE is a carrier-class, cost-effective, compact (only 3U high) STM-1/STM-4 SDH/MSPP platform that is designed for applications in metro and access networks to facilitate the efficient transport of traditional TDM and emerging data traffic for service providers.
H9MO-LMXE 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 mash network. The 3RU high 19 inch wide chassis of the H9MO-LMXE has 19 card positions, with 2 slots for the 1+1 power cards, 1 slot for network management card, 2 slots for network interface unit(NIU) cards, and 14 slots for local interface unit(LIU) cards.
 
Features
1.Support 1+1 MSP, SNCP protection
2.Management channel can be DCC bytes or E1 (VC12)
3.Support up to STM-4 rate
4.E1 BERT test is embedded
5.Ethernet service supporting GFP encapsulation, VC12 virtual concatenation (1~63 VC12) and LCAS
6.Large cross-connect matrix capacity is 1134x1134 VC-12s (18x18 VC-4s) and powerful networking ability
7.Inter-working with popular SDH/MSPP products of various vendors
8.Easy commissioning and maintenance
9.High integration, compact design
10.High reliability, low CAPEX and OPEX
 
Technical Specification
Index Performance Parameter
SDH Interface Max STM-1 32 STM-1 optical interfaces 
STM-4 4 STM-4 optical interfaces
Connector  SC/PC or FC/PC
Spec. S-1.1, L-1.1, L-1.2, S4.1, L4.1
Single fiber bi-directional interface can be optionally supported
Card
  PWR01 Power card, 1+1 redundancy supported
NM01 Network management card
OX01 Dual STM-1 fiber optic NIU card (Cross-connection and timing embedded)
OX02 Dual STM-4 fiber optic NIU card (Cross-connection and timing embedded)
OS01 Dual STM-1 fiber optic LIU card
EP01 24 E1 interface card
EP02 E3/DS3 interface card
EP03 12 E1 interface card
ED01 Dual V.35 interface card
FE01 4 Tx over 4 VCG trunk EoS card
FE02 4 Fx over 4 VCG trunk EoS card
LA01 Order wire card
PDH interface E1 Spec. Comply with G.703, 2.048Mbps, HDB3
Max E1 168E1 (fourteen EP03 cards support)
Ethernet Interface 10/100Base-Tx or 100Base-Fx
Comply with IEEE 802.3
Max FE Interface 56 FE (fourteen FE01 or FE02 cards support)
Encapsulation Comply with ITU-T G.7041 (VCAT,GFP,LCAS,)
V.35 Max Interface 28 V.35 interfaces (framed or unframed)
DCE/DTE
Cross-connect Capacity High order
Low order  18x18 VC4
1134x1134 VC-12
Management Interface 10/100Base-T
Physical Dimension (H/D/W) 3U: 136mm x 240mm x 440mm 
Power  Supply -48V DC or dual power supply
Consumption Consumption<100w
Environment Temperature 0oC-50oC
Humidity <90%
Weight <8kg

SDH multiplexer MSPP Optical Transport Equipment:H9MO-LMFE

 
Overview
H9MO-LMFE is a carrier-class, cost-effective, compact (only 1U high), STM-1/STM-4 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.
 
H9MO-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 H9MO-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 uplink, and 4 slots left for services (STM-1, Ethernet, E1, E3/DS3,V.35 Etc.).
 
Features
1.Support up to STM-4 rate SDH service
2.Support 1+1 MSP, SNCP protection
3.Ethernet service supporting GFP encapsulation, VC12 virtual concatenation (1~63 VC12) and LCAS
4.Management channel can be DCC bytes or E1 (VC12)
5.Inter-working with popular SDH/MSPP products of various vendors
6.Easy commissioning and maintenance
7.High integration, compact design
8.High reliability, low CAPEX and OPEX

Specification
service cards:
PWR01:DC-48V power card, 1+1 backup
PWR02:AC220V power card
NM02:EMS Management Card
OX01:Dual STM-1 aggregation optical card
EX01:Dual STM-1 aggregation electrical card
OX04:Dual STM-4 aggregation optical card
OS01:Dual STM-1 tributary optical card
OS02A:Ethernet +Dual STM-1 tributary optical card
OS03:Ethernet +Single STM-1 tributary optical card
EP01A:24xE1 (120W, DB60)
EP03:12xE1 (75W or 120W)
EP03A:12xE1 (120W, DB60)
EP02:1xE3/DS3
FE01:4 FE over 4 VCG trunks (EoS)
FE02:4 Fx over 4 VCG trunks (EoS), SFP
FE04:4 FE over 1~16E1 (EoE)
FE05:4 Fx over 1~16E1 (EoE), SFP
FE06:Ethernet aggregation, EOS, aggregation ratio: 8:2, dual FE ports
FE07:EOE, Ethernet aggregation, aggregation ratio: 8:2, dual FE ports
GX01:EOS, Ethernet aggregation, aggregation ratio: 8:1, single GE port
GX02:EOE, Ethernet aggregation, aggregation ratio: 8:1, single GE port
ED01:2xV.35 Card(framed or unframed)
DX02:Full 64E1 DS0 cross connection (2048x2048,64K)
LA01:Order wire card

PDH interface:
Max E1:96E1
Max E3/DS3:4 E3

Ethernet:
Interface speed:10/100Base-Tx or 100Base-Tx, Comply with IEEE 802.3
Max FE Interface:16FE(4FE/card)
Encapsulation:Comply with ITU-T G.7041 (VCAT, GFP, LCAS)

Cross-connect Capacity:
Uplink STM-1:16*16 VC4; 48*48VC3
Uplink STM-4:1008*1008VC12

NMS Interface:10/100 Base-T (can be cascaded)

EOW interface:Standard socket RJ11
PowerSupply:-48V DC /220V AC
Consumption:<40W