IDM MSAP622/155 Aggregation Optical-Electrical Integrated Transmission Equipment

I. Overview

The IDM MSAP622&155 aggregation optical-electrical integrated transmission equipment is a new-generation SDH-based multi-service optical transmission/access equipment launched by Beijing Raytrans Digital Technology Co., Ltd. It integrates SDH transmission, PBX/IP-PBX switching, and optical Ethernet switching technologies into one platform, incorporating audio/video command & dispatch functions. It is widely applicable in private networks such as public security, electric power, railway, and mining, as well as public networks including mobile, Unicom, and telecom operators.

The IDM MSAP622/155 equipment features a 19-inch (6+1)U plug-in card chassis structure. It can be configured with different quantities and types of tributary service boards as required, providing multi-service access functions. It provides uplink STM-1/STM-4 optical interfaces, with optical access board types including: STM-1 access boards and STM-4 aggregation boards; it provides downlink access for Gigabit Ethernet, Fast Ethernet, E1 services, telephone services, and various 64K services.

The IDM MSAP622/155 equipment is primarily used for service access, transmission, and aggregation at the access layer of data communication networks. It features complete synchronization timing functions, a powerful non-blocking cross-connect matrix at VC12 and 64K levels, and aggregation capabilities for voice, IP, and V24 Ethernet services.

The MSAP equipment network management platform can adopt the Netguard network management system from Beijing Raytrans Digital Technology Co., Ltd., providing hierarchical, powerful management capabilities based on a server/client model, including configuration management, fault management, performance management, permission management, and log management functions.

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Figure 1 IDM MSAP622/155 Equipment Front and Rear Panel Diagram

II. Product Features

Ø Chassis structure adopts (6+1)U plug-in card design; provides 16 front plug-in slots and 12 rear plug-in slots;

Ø The equipment integrates multiple technologies including SDH transmission, PBX voice switching, and optical Ethernet switching;

Ø Key functional modules provide mutual backup: STM-4 cross-connect aggregation board, main control board, and power supply board;

Ø Flexible system design; the same equipment can be configured as TM, ADM, or MADM modes;

Ø Provides multiple networking topologies: point-to-point, chain, ring, star, tree, ring-to-ring, ring intersection, etc.;

Ø Maximum service interface capacity:

n STM-4 interfaces: 20; STM-1 interfaces: 56

n PDH optical interfaces: 44; E1 interfaces: 536

n FE interfaces: 104; maximum bandwidth per FE interface: 50 VC12;

n GE interfaces: 16; maximum bandwidth per GE interface: 63 VC12;

n FXS/FXO/Magneto interfaces: 210; EM24 interfaces: 100; V24 interfaces: 210

n Digital trunk interfaces: 8*N (N≤8)

Ø Clock source can be selected from line clock, external clock (2Mbit/s or 2MHz), and free-running oscillation;

Ø Standard model repeaterless transmission distance is 40 km; custom configurations are available for distances beyond this;

Ø The MSAP equipment provides Ethernet management channels based on DCC, E1, N*64K, and TCP/IP, supporting SNMP simple network management protocol;

Ø The MSAP equipment provides natural heat dissipation and forced fan cooling, with intelligent temperature-controlled fans and fan status detection to ensure stable operation;

Ø The STM4 cross-connect aggregation board provides 4 STM-4 optical interfaces (optical ports can be configured online as STM-1 rates), supporting mutual backup between any two STM-4 optical ports. A single board provides 32×32 VC-4, 2016×2016 VC-12, and 512×512 64K timeslot non-blocking cross-connect, supporting unidirectional, bidirectional, and broadcast services;

Ø The STM1 cross-connect aggregation board provides 2 STM-1 optical interfaces, supporting mutual backup between the two STM-1 optical ports. A single board provides 441×441 VC-12 and 1024×1024 64K timeslot non-blocking cross-connect, supporting unidirectional, bidirectional, and broadcast services;

Ø The IDM MSAP622/155 IP access services support multiple access methods:

l G3-EOSEOP board based on EOS or EOPDH, providing 4 independent Ethernet aggregation interfaces; in EOP mode, each Ethernet interface group supports remote access of up to 63 single-E1 bridges; in EOS mode, each group supports up to 63 directions of EOS Ethernet service access;

l G3-2GE board based on EOS, providing 2 groups of Gigabit Ethernet service access, each group providing 1 optical and 1 electrical GE interface; bandwidth is N*VC12 (N≤63);

Ø The MSAP622/155 can accommodate a signaling gateway board, supporting signaling protocols such as No.1, NO.7, PRI, and V5.2;

Ø The MSAP622/155 can accommodate PCM service access boards, with over 20 types of PCM plug-in cards available for installation on the PCM user board, providing voice and data services.

III. Technical Specifications

Optical Interface

Interface Type	STM-4     SFP	Fiber Mode	Single-mode (Multi-mode optional)
TX/RX Rate	622.08Mbps/622.08Mbps	TX/RX Wavelength	1310nm/1550nm
Output Power	-12~-6dBm	Receiver Sensitivity	Better than-32dBm
Transmission Distance	20Km; long-distance optical modules can be optionally installed for extended fiber transmission
Interface Type	STM-1     FC	Fiber Mode	Single-mode (Multi-mode optional)
TX/RX Rate	155.52Mbps/155.52Mbps	TX/RX Wavelength	1310nm/1550nm
Output Power	-12~-6dBm	Receiver Sensitivity	Better than-32dBm
Transmission Distance	20Km; long-distance optical modules can be optionally installed for extended fiber transmission

E1 Interface

Line Rate	2.048Mbps	Line Code	HDB3
Standard Protocol	SupportsITU-T G.703	Impedance	75Ω/120Ω
Frame Structure	PCM30/32	Signaling	Channel-Associated Signaling

Ethernet (FE)

Interface Type	RJ-45	Transmission Rate	N×VC12 (N≤50)
Standard Protocol	Supports IEEE802.3	Operating Mode	Full/Half Duplex/Auto-Negotiation

Ethernet (GE)

Interface Type	RJ-45	Transmission Rate	N×VC12（N≤63）
Standard Protocol	SupportsIEEE802.3	Operating Mode	Full/Half Duplex/Auto-Negotiation

FXO, FXS Interfaces

Audio Range	300Hz~3400Hz	Compression	A-law per ITU G.711
Impedance	Three-element complex impedance 200Ω+560Ω//0.1μF	Loop Current	20mA/channel

Co-directional 64K Interface

Line Code	G.703 Standard	Line Rate	64Kbps
Impedance	Balanced120Ω	Fully compliant withITU G.703 Recommendation

EM2/4-Wire Interface

Audio Frequency Range	300Hz~3400Hz	Impedance	Balanced600Ω
Companding	A-law per ITU G.711	Return Loss	≥18dB

Magnetic Ring Interface

Audio Frequency Range	300Hz~3400Hz	Impedance	Balanced600Ω
Companding	A-law per ITU G.711	Return Loss	Not less than18dB

V.24 Interface

Transmission Rate

Asynchronous ≤9600bps; Synchronous 64Kbps

Electrical Characteristics

Compliant with CCITT V.28 protocol

V.35 Interface

Interface Type	RJ-45	Electrical Characteristics	Compliant withITU-T V.35Recommendation
Transmission Rate	n×64Kbps（n=0～31）	Terminal Interface	Compliant withISO2593Specification

Power Supply and Power Consumption

Power Supply

AC220V/DC-48V

Power Consumption

≤150W

Environmental Conditions

Operating Temperature

-10oC ~+50oC

Relative Humidity

0~95% (non-condensing)

Product Dimensions

Length×Depth×Height

482×309×132(mm)

IV. Application Example 1

Figure 2 Star Network Application Diagram

The IDM MSAP622/155 can form a star network with other SDH devices to provide users with telephone, data, IP, and video services.