F10-155S is a STM-1 optical transmission system, whose technical performances are fully complied with ITU-T and SDH recommendations. This system is benefit of high integration, flexible construction and strong network adaptability, etc. F10-155S provides two 155.52Mb/s aggregate line interfaces of A and B, possessing the network elements timing function of ITU-T G.813 recommendation, and VC-12 full-crossing connection and channel protection function. F10-155S has the following usages:
 As an ADM, it can be inserted in STM-1 ring which provide 32×E1 tributaries;
 As a terminal, it can multiplex 32×E1 to a line port;
Network element management of F10-155S system is based on unified network management platform Fi-View-SDH. Fi-View-SDH is designed in accordance with related recommendations of ITU-T, so as to realize network resources, equipment configuration, alarm, performance and security management; it can support unified management of multiple optical-route non-interconnected sub-net, and support remote network monitoring by way of Internet.

2.Features
World leading design adopts independent , with 1U single-board structure, compactness, high reliability, low power consumption;
Provides 63 X 63 VC12 non-blocking cross-connect, supports tributaries Add/Drop of 163 E1, with capability of unidirectional and bi-directional multiplexing;
Supports network of point to point, chain and ring, providing functions like tributaries 1+1 channel protection, etc.;
Can realize independent service-assignment or mutual protection between two optical interfaces, and can build (connected with F10-155C) various complex networks of STM-1 multi-ring, and multi-branch, etc.;
Provides timing synchronous interface, implements switching of multiple timing sources like 2Mb/s, 2MHz, STM-1, etc., and output of 2Mb/s, 2MHz reference clock.
Provides multiple service interfaces of E1, 10/100M Ethernet, RS232, V.35,etc.
Ethernet access support Link Capacity Adjustment Scheme(LCAS) for dynamic bandwidth management;
Provides Engineer Order Wire (EOW) interface (two-line model), with group call and dial functions;
Provides D1-D3 ECC channel, network management adopting TCP/IP communication protocol;
Provides F (Ethernet) and f (RS232) NMS interface, network management platform Fi-View-SDH can realize ITU-T recommendations five functions of resources, configuration, alarm, performance, and security, etc.;
Network management platform Fi-View-SDH can realize software remote downloading, with software live-upgrading capability, being easy to maintain, can realize remote monitoring;
Through replacing optical devices, supports ultra-long distance (≤80km), long distance (≤50km) and short distance (≤30km) optical transmission;
Equipment adopts natural wind heat emission, with stable and reliable work.
Below is only for ChassisF10-155C
4U height Chassis is made up of Element Management Unit(EMU), Cross-Connect and CLK Card,Optical Card, E1 mapping Card and Ethernet mapping card,
4-optical-port, STM-1 MADM or TM multiplexer;
Support up to 126 E1-circuit add/drop;
Support up to 32 10/100Base-T;
Support cross connection of all VC12 ;

3.Specification
Mechanical dimensions
Dimensions: 293D x 434W x 44 Hmm
Weight: 4.0Kg

Environmental requirements
Power supply: -48 VDC±10% or
             180-265VAC
Fully equipment power consumption: 25W±10%
Operating temperature: 0°C~45°C
Humidity: ≤90% (free from condensing)
Atmospheric pressure: 70~106 Kappa
Storage temperature: -20°C ~70°C

STM-1 optical interface
Bit Rate 155.520Mb/s±4.6ppm
Standard  ITU-T G.957/G.958
wavelength  1310nm /1550nm
Distance 50Km
Sensitivity Better than -36dB
Connector FC/SC

E1 interface
Bit Rate 2.048Mb/s±50ppm
Encoding HDB3
Standard  ITU-T G.703
Connector 2mm high density connector
Impedance 75Ω/120Ω
Jitter performance Comply ITU-T G. 823

Ethernet interface
Compatible with 10/100Base-T
Connector: RJ45

External timing source interface (REF)
Standard ITU-T G.813/783
Input T1, T3
Output T4
Working mode:  tracing, holding & free run
Interface Micro-mini coaxial

Engineer Order Wire (EOW) interface
Bit Rate 64Kb/s
Signal mode Dual tone multi-frequency dialing mode
Ring frequency  450Hz
Ring mode  Buzzer
NE address range 00~99

Serial NMU (RS-232) interface
Bit Rate  115200b/s
Interface  DB9

Ethernet NMU (RJ-45) interface
Bit Rate 10/100M
Mode Full/half duplex auto-negotiation
Interface RJ-45