PCM Equipment IDM MSAP-G3CP SDH High-Capacity Integrated Service Cross-Connect Multiplexing Equipment
48 optical directions
The IDM MSAP-G3CP SDH High-Capacity Integrated Service Cross-Connect Multiplexing Equipment is an integrated service platform that combines narrowband service access, broadband service access, PCM multiplexing, 64K time-slot cross-connection, E1 cross-connection, STM-1/STM-4 cross-connection, SDH/PDH optical transmission, telephone switching digital signaling access, Ethernet switching, and multimedia dispatching. It is an integrated service platform that integrates communication access, transmission, switching, switching, dispatching, and video display control.
IDM MSAP-G3CP SDH High-Capacity Integrated Service Cross-Connect Multiplexing Equipment is an integrated service platform that combines narrowband service access, broadband service access, PCM multiplexing, 64K time-slot cross-connection, E1 cross-connection, STM-1/STM-4 cross-connection, SDH/PDH optical transmission, digital signaling access for telephone switching, Ethernet switching, and multimedia dispatching. It is developed by Beijing Ruiguang Jiyuan Digital Technology Co., Ltd. and is used for service access, transmission, and aggregation at the access layer of data communication networks. As a 336-channel E1 integrated service access device, it concentrates 48 optical directions, 336 E1 channels, and 4032×4032 non-blocking full cross-connect of 64K time slots into a single 19-inch (6+1)U chassis, so an aggregation node of a large industrial private network no longer needs multiple time-slot cross-connect equipment and optical multiplexing equipment cascaded together. With this product, Raytrans provides highly integrated access-layer support for government private network optical fiber communication solutions, military emergency communications vehicle solutions, and smart mining communication solutions, and also demonstrates its R&D strength as a professional SDH equipment manufacturer and optical multiplexer manufacturer.
Key Specifications at a Glance: 48 optical directions · 336 E1 channels · 4032×4032 cross-connect · dual-board mutual backup · 19-inch (6+1)U card-based chassis · dual AC220V/dual DC-48V two-level power supply mutual backup
Figure 1: IDM MSAP-G3CP SDH High-Capacity Integrated Service Cross-Connect Multiplexing Equipment — front view of the complete 19-inch (6+1)U chassis, close-up of 16 front card slots and alarm indicator LEDs
What Kind of Device Is a 336-Channel E1 Integrated Service Cross-Connect Multiplexer?
IDM MSAP-G3CP is a centralized card-based device. Its chassis adopts a (6+1)U structure and card-based design, providing 16 front card slots and 12 rear card slots, with service cards configured according to the on-site service list. As an integrated service access device under Raytrans, one side of the device interfaces with the transmission network through STM-1/STM-4 optical interfaces and E1 interfaces, while the other side provides telephone, magneto, common battery, V.24/V.35 data, and Ethernet interfaces by inserting different types of service cards. After voice, data, and Ethernet services enter the device, they are uniformly multiplexed into E1 or STM-N channels and scheduled by the internal cross-connect matrix.
It plays the dual role of access layer and aggregation layer: downward, it accesses narrowband services and Ethernet services of remote stations; upward, it connects to the upper-level transmission network through STM-1/STM-4 optical interfaces. The device has complete synchronous timing functions and a VC12-level, 64K-level non-blocking cross-connect matrix, so voice, IP, data, and Ethernet services can be aggregated and transmitted over the same network. The unit integrates the capabilities of PCM multiplexing, time-slot cross-connect equipment, and optical multiplexing equipment, and can serve as an access aggregation node in government private network optical fiber communication solutions, military emergency communications vehicle solutions, and smart mining communication solutions.
What This Device Can Do: Core Functions at a Glance
IDM MSAP-G3CP integrates narrowband service access, PCM multiplexing, time-slot cross-connection, SDH optical transmission, signaling switching, Ethernet switching, and network management on the same platform. The functions and their descriptions are shown in the table below.
Function | Description |
|---|---|
Narrowband service access | Provides voice channel interfaces such as automatic telephone, common battery telephone, and magneto telephone, supporting 300 voice channels; on the data side, provides V.24/RS232/RS485/RS422, X.50/X.58, codirectional 64K, Nx64K bandwidth V.35/V.36, and Ethernet interfaces, supporting 300 channels |
PCM multiplexing | Organizes and multiplexes 64K narrowband voice channels and data services into E1 channels for transmission according to the PCM30/32 frame structure |
64K time-slot full cross-connect | Provides 4032×4032 non-blocking full cross-connect of 64K time slots; any input time slot can be scheduled to any output time slot |
2M time-slot cross-connection | Provides 2016×2016 non-blocking full cross-connect of 2M time slots |
VC-4 space-division cross-connection | Provides 32×32 space-division cross-connect of VC4 |
SDH/PDH optical transmission | Provides standard STM-4/STM-1 optical transmission interfaces and standard E1 interfaces, supporting 48 optical directions and 336 E1 channels |
Signaling and SPC switching | Provides signaling switching and processing functions and stored program control (SPC) switching functions, supporting SS7, No.1, PRI, and V5.2 signaling |
Ethernet switching | Provides FE and GE Ethernet interfaces compliant with IEEE802.3, with bandwidth configured in units of N×VC12 |
Multimedia dispatching | Integrates communication access, transmission, switching and dispatching, and video display control on the same platform |
Network management | Can use the Netguard network management system with server/client hierarchical management, including configuration, fault, performance, permission, and log management, and supports SNMP |
How 48 Optical Directions, 336 E1 Channels, and 4032×4032 Non-Blocking Full Cross-Connect Work Together
48 optical directions and 336 E1 channels in a single unit mean that one device can handle the access requirements of an aggregation node in a large industrial private network. Optical directions are provided by STM-4/STM-1 optical interfaces and can form chain networks, ring networks, and star networks; E1 interfaces connect to existing PDH transmission equipment and remote small-capacity access equipment. Where there are many access directions and widely distributed sites, there is no need to configure a separate aggregation device for each direction, and cabinet space and supporting power supply are reduced accordingly.
Knowledge block: 4032×4032 non-blocking full cross-connect of 64K time slots. This means the cross-connect matrix uses 64K time slots as its granularity, establishing an independent connection relationship for each of the 32 time slots of every E1. Any input time slot can be connected to any output time slot, and connections do not compete for matrix resources. PCM30/32 is the frame structure standard of the E1 base group, with 32 time slots per frame, of which TS0 is used for frame alignment and alarms, TS16 is used for channel-associated signaling (CAS), and the remaining 30 time slots carry 64K services. Under this mechanism, voice and data can be scheduled arbitrarily; adding or adjusting circuits only requires changing the cross-connect configuration, without affecting existing services.
On top of this, the device also provides 2016×2016 non-blocking full cross-connect of 2M time slots and 32×32 VC4 space-division cross-connect. The combined scheduling capabilities at the E1 layer, 2M layer, and VC-4 layer allow services of the access layer, aggregation layer, and transmission layer to flow within the same device, so voice and data can be scheduled arbitrarily without blocking due to matrix conflicts.
Protection and Reliability: Dual-Board Mutual Backup and Dual AC/DC Power Supply Mutual Backup
IDM MSAP-G3CP is designed for unattended sites, with key modules and power supply links configured for mutual backup:
VC-4 space-division cross-connect card, 64K cross-connect card, main control card, and power card are configured with dual-board mutual backup; when the active board fails, the standby board takes over;
Dual AC 220V and dual DC -48V two-level power supply mutual backup; the mains power and DC power systems back each other up;
1+1 protection for dual STM-1/STM-4 optical ports; critical circuits are not interrupted when a single segment of optical fiber fails;
1+1 and 1:N protection for E1 ports;
Multiple clock source selection and protection switching among SDH line-recovered clock, E1 line-recovered clock, and master clock.
How to Use Network Management and Online Testing
Network management can use the Netguard network management system, providing server/client-based hierarchical management capabilities, including configuration management, fault management, performance management, permission management, and log management, and supporting the SNMP network management protocol. The accompanying network management software system covers SDH integrated configuration and DXC cross-connection functions, and can perform online testing of audio channel levels, 64K time-slot channels, and E1 channel bit errors, so O&M personnel can locate problems without interrupting services.
Technical Specifications
The following parameters are taken from the product documentation of IDM MSAP-G3CP; the specific configuration is subject to the manufacturer's technical documentation and commercial confirmation. As an integrated service access device under Raytrans, this product has complete specification definitions in the parameter systems of PCM, time-slot cross-connect equipment, and optical multiplexing equipment.
Optical Interface Parameters
Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
STM-4 interface type | SFP | Single-mode (multi-mode optional) optical port |
STM-4 receive/transmit rate | 622.08Mbps/622.08Mbps | Receive/transmit wavelength 1310nm/1550nm |
STM-1 interface type | FC | Single-mode (multi-mode optional) optical port |
STM-1 receive/transmit rate | 155.52Mbps/155.52Mbps | Receive/transmit wavelength 1310nm/1550nm |
Transmit optical power | -12~-6dBm | Common specification for optical ports of both rates |
Receiver sensitivity | Better than -32dBm | Actual transmission distance is calculated based on the optical power budget |
Transmission distance | 40Km | Long-distance optical modules can be installed for longer transmission distance |
Number of optical directions | Up to 48 | Provided by STM-4/STM-1 optical interfaces |
E1 Interface Parameters
Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
Bit rate | 2.048Mbps | Standard E1 line rate |
Line coding | HDB3 | Line coding compliant with ITU-T G.703 |
Standard protocol | Supports ITU-T G.703 | International standard followed by the E1 interface |
Impedance | 75Ω/120Ω | 75 Ω coaxial or 120 Ω balanced interface form |
Frame structure | PCM30/32 | 32 time slots per frame, 30 time slots carry services |
Signaling | Channel-associated signaling (CAS) | Line and voice channel status is transmitted along with voice time slots |
Number of E1 interfaces | Up to 336 | Upper limit of E1 access for a standalone unit |
Ethernet Interface Parameters
Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
Interface type | RJ-45 | Ethernet electrical interface |
FE transmission rate | N×VC12 (N≤50) | Compliant with IEEE802.3, full/half duplex/adaptive |
GE transmission rate | N×VC12 (N≤63) | Compliant with IEEE802.3, full/half duplex/adaptive |
Voice and Data Interface Parameters
Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
FXO and FXS interfaces | Audio range 300 Hz~3400 Hz, compression ITU G.711 A-law | Three-element complex impedance 200 Ω+560 Ω//0.1 μF, loop current 20 mA per channel |
E&M 2/4-wire interface | Audio range 300 Hz~3400 Hz, impedance balanced 600 Ω | Compression ITU G.711 A-law, return loss no less than 18 dB |
Magneto interface | Audio range 300 Hz~3400 Hz, impedance balanced 600 Ω | Compression ITU G.711 A-law, return loss no less than 18 dB |
Codirectional 64K interface | Line coding G.703 standard, bit rate 64 Kbps | Impedance balanced 120 Ω, compliant with ITU-T G.703 recommendation |
V.24 interface | Asynchronous ≤9600 bps; synchronous 64 Kbps | Electrical characteristics compliant with CCITT V.28 protocol |
V.35 interface | Interface type RJ-45, transmission rate n×64 Kbps (n=0~31) | Electrical characteristics compliant with ITU-T V.35 recommendation, terminal interface compliant with ISO2593 |
Number of voice and data interfaces | 300 channels each | Voice and data accessed in a mixed manner within the same chassis |
Power Supply, Environment and Chassis
Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
Power supply mode | AC 220 V/DC -48 V | Dual AC 220 V and dual DC -48 V two-stage mutual-backup power supplies |
Overall power consumption | ≤150 W | Upper limit of overall power consumption |
Operating temperature | -10℃~+50℃ | Communications equipment room and industrial site environments |
Relative humidity | 0~95% (non-condensing) | Normal operation under non-condensing conditions |
Product dimensions | 482×309×132(mm) | Length × depth × height, 19-inch rack installation |
Chassis structure | (6+1)U card-based | 16 front card slots and 12 rear card slots |
Typical Application Scenarios
As an integrated service access device for the private network market, IDM MSAP-G3CP leverages its converged capabilities of PCM, time-slot cross-connect equipment and optical multiplexing equipment. It serves scenarios such as electric power and energy industrial private networks, rail transit and pipe gallery communications, and military and government private networks, mostly in the role of an aggregation node, providing reliable support for government private network optical fiber communication solutions, military emergency communications vehicle solutions and smart mining communication solutions.
Electric Power and Energy Industrial Private Network
In an electric power private network, dispatch telephones as well as telecontrol and monitoring data run between substations, switching stations and the dispatch center. IDM MSAP-G3CP aggregates the E1 and optical paths from all directions, cross-connects voice channels and data to the corresponding channels at the 64K time slot level, so that a single E1 carries both voice and data. Channel-associated signaling (CAS) enables telephone services to intercommunicate with existing PCM switching equipment, and adding a new bay or adjusting service assignment requires only a change to the cross-connect configuration. The 1+1 and 1:N protection of E1 ports and dual-board mutual backup keep channels available for unattended sites even when a single-segment line is abnormal. This time-slot cross-connect equipment capability also applies to the underground and surface voice dispatching and data backhaul in smart mining communication solutions.
Rail Transit and Pipe Gallery Communications
Rail transit and pipe gallery sites are distributed along the line, and inter-station liaison telephones, monitoring data and Ethernet services need to be aggregated at the central side. IDM MSAP-G3CP forms ring networks or chain networks with 48 optical directions, aggregating the E1 and Ethernet services of sites along the line to the aggregation node. The access capacity of 336 E1 channels allows voice channels and data at each site to be allocated by direction, without deploying separate transmission equipment for each service. The chassis is a 19-inch (6+1)U card-based structure, so capacity expansion only requires adding or replacing service cards. For government private network optical fiber communication solutions, the ring network aggregation capability of this optical multiplexing equipment effectively reduces the cost of duplicate line construction.
Military and Government Private Network
Power supply conditions at military and government private network sites vary with the site, and both AC power in equipment rooms and DC power in vehicles and at sites may be encountered. IDM MSAP-G3CP supports dual AC 220 V and dual DC -48 V two-stage mutual-backup power supplies and can be installed in a standard cabinet. At the remote end, small-capacity integrated service cross-connect access devices such as IDM MUX8 and IDM MAP8E1-30 can be used to access the local transmission network through E1 interfaces, connecting FXS analog telephones, magneto telephones and common battery telephones to analog telephones, magneto telephones and common battery telephones, while the aggregation side is uniformly dispatched by one MSAP-G3CP. In military emergency communications vehicle solutions, the dual mutual-backup power supplies and compact chassis structure of this integrated service access device adapt to vehicle vibration and power supply switching environments.
Figure 2: Ring and star topology of IDM MSAP-G3CP as an aggregation node networking with remote IDM MUX8 and IDM MAP8E1-30, marked with STM-1/STM-4 optical directions and E1 trunk access
Conclusion
As a representative integrated service access device in the PCM product showcase, IDM MSAP-G3CP completes access and dispatching with a single 19-inch (6+1)U card-based device: 48 optical directions, 336 E1 channels of access, 4032×4032 64K time-slot non-blocking full cross-connect, together with dual-board mutual backup and dual AC/DC two-stage mutual-backup power supplies. It can be deployed as 336-channel E1 integrated service cross-connect multiplexing equipment at the aggregation nodes of electric power and energy industrial private networks, rail transit and pipe gallery communications, and military and government private networks. The device integrates the core capabilities of time-slot cross-connect equipment and optical multiplexing equipment. Developed and manufactured by Raytrans, it can serve as a key node device in government private network optical fiber communication solutions, military emergency communications vehicle solutions and smart mining communication solutions. As a professional SDH equipment manufacturer and optical multiplexer manufacturer, Raytrans continues to provide stable and reliable integrated service access devices for various private network scenarios. Before deployment, it is recommended to calculate the number of voice, data and Ethernet channels according to the site service list, and then determine the service card configuration and the number of optical directions.
