IDM OMP4000-4E1-30E Ultra-Broadband Integrated Service Optical Multiplexing Equipment, 4 Gigabit Ethernet Ports, 4 E1 Ports, 30 Telephone Channels
Dual 5G optical ports with 1+1 protection
IDM OMP4000-4E1-30E physically isolated gigabit network telephone optical multiplexer with 5G optical interfaces, 19-inch 1U standard chassis, providing 2 × 5 Gbps SFP optical interfaces with 1+1 protection for optical ports; providing 30 voice access channels + 4 E1 + 4 physically isolated line-rate gigabit Ethernet ports; providing a standard SNMP network management interface;
The 5G optical port integrated service multiplexing equipment is an ultra-broadband integrated service optical fiber multiplexing equipment developed by Beijing Ruiguang Jiyuan Digital Technology Co., Ltd. under model IDM OMP4000-4E1-30E. As an optical multiplexer product for multi-service scenarios, it transmits 30 voice channels, 4 E1 leased lines and 4 physically isolated line-rate gigabit Ethernet connections simultaneously over a pair of 5 Gbps optical fibers, integrating the functions of a telephone optical multiplexer, a multi-service optical multiplexer and a gigabit network optical multiplexer.
The equipment adopts the PCM30/31 format and multiplexes voice, E1 leased lines and Ethernet data into the same optical link over their respective channels. With one unit deployed at each end and connected back-to-back over a single optical fiber link, services are transmitted as they are. It is a typical optical multiplexing equipment and integrated service access device. The two 5 Gbps SFP optical ports can be configured as one active and one standby; when a single fiber is interrupted, services are automatically switched to the backup channel, and telephone and E1 connections do not need to be renegotiated.
The IDM OMP4000-4E1-30E uses a standard 19-inch 1U chassis and is equipped with a function control switch and alarm indications, so the operating status of the site can be seen clearly at the front of the cabinet. The 30 voice channels, 4 E1 channels and 4 isolated gigabit Ethernet ports are concentrated in one device, replacing the previous deployment mode of stacking multiple single-function PCM equipment. In government private network optical fiber communication solutions, this PDH product effectively simplifies site product showcase and O&M management.
Key Specifications at a Glance: dual 5G optical ports with 1+1 protection (2×5 Gbps SFP) · 4 isolated gigabit Ethernet ports (4×1000M line rate, 4000M in total) · 30 voice channels + 4 E1 · dual power supply ≤100 W · SNMP network management · 19-inch 1U chassis. During project selection, priority may be given to optical multiplexer manufacturers with independent R&D capabilities, such as Raytrans.
What Is the 5G Optical Port Integrated Service Multiplexing Equipment
The 5G optical port integrated service multiplexing equipment is a multi-service access device that multiplexes voice, E1 leased lines and Ethernet data onto the same 5 Gbps optical fiber. It belongs to the category of optical multiplexing equipment commonly seen in product showcase, and the IDM OMP4000-4E1-30E is one model characterized by dual 5G optical ports with 1+1 protection, 4 isolated gigabit Ethernet ports and 30 voice channels + 4 E1. It is also a representative model from the optical multiplexer manufacturer Raytrans for integrated service access scenarios.
The device provides 30 telephone interfaces, 4 E1 channels and 4 physically isolated line-rate gigabit Ethernet ports in a single 1U chassis, and the interface types and capacities are checked item by item against the site service list. On engineering sites, this type of equipment is also often called a 4-port physically isolated gigabit network telephone optical multiplexer, because the 4 gigabit ports each form an independent network and do not forward traffic to one another, rather than hanging on the same switching and forwarding resources.
The principle of multiplexing and transmission is to put different services into their respective time slots or channels and then uniformly encapsulate them onto the 5 Gbps optical link. Telephone signals are encoded into 64 Kbps voice channels according to ITU-T G.711 A-law, E1 is transparently transmitted at 2048 Kbps with HDB3 line coding according to ITU-T G.703, and Ethernet is forwarded at line rate according to IEEE 802.3. The three types of services each use their own channels on the same optical link and do not occupy each other's bandwidth.
Once voice, E1 and Ethernet are consolidated into one optical fiber, cross-site cabling is reduced to optical cable work only, and civil works and cabling costs decrease accordingly. When two IDM OMP4000-4E1-30E units are used back-to-back, the configurations of existing telephone exchanges, dispatch automation equipment and network equipment at the site side need not be changed, and services arrive at the central equipment room as they are.
Figure 1: Front view and indicators of the IDM OMP4000-4E1-30E ultra-broadband integrated service optical fiber multiplexing equipment
How One 1U Device Simultaneously Carries 30 Voice Channels, 4 E1 Channels and 4 Isolated Gigabit Ethernet Ports
The IDM OMP4000-4E1-30E concentrates subscriber interfaces originally scattered across multiple devices into one 1U chassis. The 30 voice channels, 4 E1 transparent transmission channels and 4 physically isolated gigabit Ethernet ports can operate online simultaneously, giving the device the dual role of a multi-service optical multiplexer and PCM equipment. The interface capabilities and applicable conditions of each function are shown in the table below; the specific interface types and quantities are determined by the ordering configuration:
| Function | Description |
|---|---|
| 30 voice channel access | FXO, FXS or magneto interfaces selectable; audio range 300 Hz to 3400 Hz; ITU-T G.711 A-law compression; loop current 25 mA per channel; can be directly connected to SPC exchanges, analog trunks or magneto telephones |
| 4 E1 transparent transmission channels | Provides 4 E1 channels with a bit rate of 2048 Kbps and HDB3 line coding, compliant with ITU-T G.703; impedance 75 Ω/120 Ω selectable; frame structure PCM30/31; transparent transmission does not change time slot content |
| Voice and E1 multiplexing | 30 voice channels and 4 E1 channels are multiplexed into the 5 Gbps optical link over their respective channels and arrive at the peer end simultaneously over one optical fiber; the two types of services do not occupy each other's bandwidth |
| 4 isolated gigabit Ethernet ports | 4 physically isolated line-rate 1000M Ethernet ports, 4000M in total; independent port bandwidth and security zones; compliant with IEEE 802.3; full/half duplex/adaptive |
| Dual 5G optical ports with 1+1 protection | 2 5 Gbps SFP optical ports configured as one active and one standby; when either optical port loses its fiber, services are automatically switched to the standby optical port |
| SNMP network management and alarms | Provides a standard SNMP network management interface; together with the function control switch and alarm indications, the operating status of the site can be monitored remotely |
The telephone interfaces are encoded according to ITU-T G.711 A-law with a loop current of 25 mA per channel, and no additional conversion equipment is required when connecting to SPC exchanges, analog trunks and magneto telephones. The 30 voice channels each occupy an independent channel within the device, and one channel going off-hook does not affect the call quality of the other voice channels.
The E1 interfaces comply with ITU-T G.703, with HDB3 line coding and 75 Ω/120 Ω selectable impedance, and do not change time slot content in transparent transmission mode. The data configuration of the peer dispatch automation equipment can be retained as it is, and time slot mapping need not be redone between the two ends.
How Dual 5G Optical Ports with 1+1 Protection Keep Services Uninterrupted When a Fiber Breaks
Dual 5G optical ports with 1+1 protection means configuring two 5 Gbps SFP optical ports as two optical fiber channels, one active and one standby. Services are normally transmitted over the active fiber, while the standby fiber remains in hot standby. When the active optical port loses its fiber, the optical module degrades or the peer end becomes abnormal, the device detects the abnormal receive optical power and automatically switches services to the standby optical port, and telephone and E1 connections do not need to be renegotiated.
The redundancy resides at the optical path layer and does not rely on upper-layer protocol rerouting, and protection switching does not discriminate between service types. When any segment of fiber in a chain network, ring network or point-to-multipoint star network is interrupted, services are still transmitted over the spare fiber core, and substations, rail transit lines and classified equipment rooms do not need to be equipped with a separate set of protection switching protocols. This feature also makes the device a reliable option for optical multiplexer selection in government private network optical fiber communication solutions.
The optical modules are pluggable SFP modules with 1310 nm/1550 nm selectable wavelengths, a transmit optical power of -1 to -3 dBm and a receiver sensitivity better than -24 dBm. The link loss budget can be calculated from these two values, and the distance grade of the optical module can then be determined, which fits on-site conditions better than selecting directly by nominal distance.
Figure 2: Rear panel service interfaces of the IDM OMP4000-4E1-30E: layout of 4 E1 channels, 30 voice channels and 2 SFP optical ports
How the 4 Physically Isolated Gigabit Ethernet Ports Are Divided to Ensure Service Security
The 4 isolated gigabit Ethernet ports ensure security because each port uses an independent channel inside the device, sharing neither bandwidth nor forwarding resources. The IDM OMP4000-4E1-30E provides 4 physically isolated line-rate gigabit Ethernet ports, with a single-port line rate of 1000M and 4000M in total; one port running at full load does not affect forwarding on another port. When used as a gigabit network optical multiplexer, it meets the bandwidth requirements of parallel multi-network operation.
During deployment, services are assigned to different ports according to network security levels, following the principle that important services occupy dedicated ports and services of the same type are grouped into the same group, which facilitates both zone-based management and individual maintenance. On site, services are mapped according to the following four categories, and the specific grouping is adjusted with the site network plan:
- Video surveillance: occupies 1 gigabit port; camera streams are transmitted back separately and do not share traffic with office traffic;
- Dispatch data: occupies 1 gigabit port and carries real-time data between the dispatch master station and the station end;
- Office and inspection: occupies 1 gigabit port for site O&M terminals;
- Production service systems: occupies 1 gigabit port and is isolated from the dispatch network.
The networks are physically isolated from one another and invisible to each other, and maintenance on one port does not affect other services. Compared with connecting multiple services to the same ordinary switch, this approach provides clearer network zoning boundaries and better meets the zoning management requirements of the electric power, rail transit and classified industries. Raytrans' PDH and integrated service access designs for this product series are also built around this zoning approach, enabling the device to accommodate the multi-service carrying requirements of telephone, E1 and isolated Ethernet in government private network optical fiber communication solutions.
Core Technical Specifications
As a multi-service optical multiplexer, the IDM OMP4000-4E1-30E has core specifications covering five parts: optical interfaces, E1 interfaces, Ethernet interfaces, telephone interfaces, and power supply and environment. Key indicators are shown in the table below. The values are taken from the optical multiplexer manufacturer's product documentation; during project selection, calculations are made according to the actual line and service volume, and the distance grade of the optical module is determined separately based on the link loss budget.
| Item | Parameter/Specification | Description/Applicable Conditions |
|---|---|---|
| Optical interface type | SFP | Pluggable optical module, facilitating replacement by distance and spare parts stocking |
| Optical fiber rate | 5 Gbps | Provides 2 5 Gbps SFP optical ports, supporting 1+1 protection for optical ports |
| Fiber mode | Single-mode (multimode optional) | Selected according to line distance and existing fiber core conditions |
| Wavelength | 1310 nm/1550 nm | Two wavelengths selectable |
| Transmit optical power | -1 to -3 dBm | Typical single-mode value; subject to actual measurement with an optical power meter |
| Receiver sensitivity | Better than -24 dBm | The link loss budget can be calculated on this basis |
| Number of E1 channels | 4 | Provides 4 E1 interfaces, supporting transparent transmission mode |
| E1 bit rate | 2048 Kbps | HDB3 line coding |
| E1 standard protocol | Supports ITU-T G.703 | Standard E1 interface specification |
| E1 impedance | 75 Ω/120 Ω | Selected according to the interface of the interconnected equipment |
| E1 frame structure | PCM30/31 | Primary group frame structure |
| E1 mode | Transparent transmission | Services are transmitted as they are, without changing time slot content |
| Number of telephone interfaces | 30 | FXO, FXS or magneto types selectable |
| Telephone audio range | 300 Hz to 3400 Hz | Telephone voice channel bandwidth |
| Telephone audio impedance | Three-element complex impedance 200 Ω+560 Ω//0.1 μF | Telephone subscriber line interface standard |
| Compression | ITU G.711 A-law | 64 Kbps PCM encoding |
| Loop current | 25 mA per channel | Feeding capability of each voice channel |
| Ethernet interface type | RJ45 | Standard Ethernet electrical port |
| Ethernet transmission rate | 10M/100M/1000M | Compliant with IEEE 802.3; full/half duplex/adaptive |
| Ethernet port configuration | 4 physically isolated line-rate 1000M ports | 4 independent bandwidths, 4000M in total |
| Ethernet physical isolation | Independent port channels | Services do not share bandwidth or forwarding resources |
| Network management interface | Standard SNMP | Supports remote monitoring of site operating status |
| Chassis structure | Standard 19-inch 1U | Facilitates rack installation in a cabinet |
| Power supply mode | DC-48 V / AC220 V / dual power supply | Dual power supply adapts to different equipment room power conditions |
| Overall power consumption | ≤100 W | Overall value including service interfaces and optical modules |
| Operating temperature | 0℃～40℃ | Equipment room or temperature-controlled cabinet environment |
| Humidity | ≤90% (non-condensing) | Upper limit of relative humidity |
The optical port rate of 5 Gbps, the transmit optical power of -1 to -3 dBm and the receiver sensitivity better than -24 dBm together determine the link budget. The 300 Hz to 3400 Hz audio range and G.711 A-law encoding of the telephone interfaces determine voice channel compatibility; during selection, compare them item by item against the interface types and signaling of the peer equipment.
Figure 3: IDM OMP4000-4E1-30E dual 5G optical port 1+1 protection point-to-point networking schematic
Typical Application Scenarios
As an integrated service access device, IDM OMP4000-4E1-30E is deployed mainly in three types of sites: industrial private networks such as electric power and rail transit, security private networks such as military and public security, and unattended field sites. The common requirement of these three types of sites is to send telephones, E1 leased lines and isolated data back to the center over a single optical fiber, without accepting long-term downtime.
Electric Power and Energy Private Network
Substations, power plants and distribution automation sites need to transmit dispatch telephones, automation E1 leased lines and in-station data networks simultaneously. Each site hosts one IDM OMP4000-4E1-30E, which multiplexes inter-station dispatch audio, 4 E1 leased-line channels and 4 physically isolated gigabit Ethernet interfaces over one 5Gbps optical fiber for transmission; at the central side, a single optical fiber collects all services.
Telephone interfaces use G.711 A-law with a loop current of 25mA per channel and connect directly to dispatch voice equipment, while 4-channel E1 transparent transmission frees the opposite-end automation equipment from configuration changes. With dual 5G optical port 1+1 protection enabled, if any section of the inter-station optical cable is interrupted, telephone and E1 services are automatically switched to the backup channel, and the dispatch console does not need to redial.
Rail Transit Communication
Stations and tunnel sections of metro and conventional railways, as well as expressway toll stations and monitoring sub-centers, need to aggregate telephones, E1 trunks and network data along the line back to the central equipment room. At each site along the line, one IDM OMP4000-4E1-30E serves as both a telephone optical multiplexer and a gigabit network optical multiplexer, accessing 30 voice channels, 4 E1 channels and 4 physically isolated gigabit Ethernet interfaces at the same time and sending them to the center over a 5Gbps optical fiber.
The device supports dual power supply (DC-48V and AC220V) with overall power consumption ≤100W, suiting long-term operation in unattended equipment rooms along the line. The 4 physically isolated gigabit Ethernet interfaces let monitoring, office and dispatch networks each use an independent port, so inspection of one port does not affect the other networks.
Military, Public Security and Unattended Sites
Field training sites, emergency command posts and classified public security equipment rooms emphasize one terminal, many uses and reliable operation. One IDM OMP4000-4E1-30E PCM equipment carries 30 telephones, 4 E1 channels and 4 physically isolated gigabit Ethernet interfaces at the same time, reducing the number of units and cable deployment; relocation and redeployment require moving only one 1U device.
Dual 5G optical port 1+1 protection ensures that command and dispatch telephones are not interrupted when a single optical fiber fails. Dual power supply supports both DC-48V and AC220V equipment room conditions, making it easy to work from station AC or communications DC power; overall power consumption ≤100W puts less pressure on field solar and storage battery power.
Figure 4: Service access scenario of IDM OMP4000-4E1-30E rack-mounted in a power and rail site cabinet
Differentiated Value: What Dual 5G Optical Ports and 4 Physically Isolated Gigabit Interfaces Bring
The differentiated value of IDM OMP4000-4E1-30E centers on three aspects: optical path redundancy, service convergence and network isolation. The capabilities and on-site benefits corresponding to the four selling-point short labels are shown in the table below; during selection, compare row by row against service requirements.
| Selling-Point Short Label and Differentiated Selling Point | Value to Users |
|---|---|
| Dual 5G optical port 1+1 protection: 2 5Gbps SFP optical ports, one active and one standby; fiber break automatically switches to the standby optical port | Telephone and E1 services are not interrupted on private network link failure; the backup fiber stays hot-standby, and O&M personnel do not need to go on site to change patch cords |
| 4 physically isolated gigabit Ethernet interfaces: 4 physically isolated wire-speed gigabit interfaces, 4000M in total | Monitoring, office, dispatch and production data each use an independent port; one fully loaded link does not take bandwidth from another, and security zone boundaries are clear |
| 30 telephones + 4E1: a single unit provides 30 FXO/FXS/magneto voice channels and 4-channel E1 transparent transmission | Voice and leased lines are consolidated into the same 1U device, eliminating separate voice equipment and patch panels, with equipment room space and cabling reduced accordingly |
| Dual power supply ≤100W: DC-48V and AC220V dual power supply, overall power consumption ≤100W | Suits both communications equipment room DC and station AC power conditions, and long-term operation at unattended sites |
How to Select a 5G Optical Port Integrated Service Multiplexer
To select an optical multiplexing equipment, check item by item against four aspects — number of service channels, optical fiber conditions, redundancy requirements and power supply environment — and the configuration is settled; once all four are checked against the site list, the model and interface combination are basically clear. The four check items and common practices are as follows:
- Count service channels: confirm the number of telephone channels (IDM OMP4000-4E1-30E provides 30, selectable FXO/FXS/magneto), E1 channels (4) and physically isolated gigabit ports; if the interface type or quantity does not match, change the model or add interfaces.
- Check optical fiber conditions: confirm single-mode or multi-mode and whether the wavelength is 1310nm or 1550nm; calculate the loss budget with transmit optical power of -1~-3dBm and receiver sensitivity better than -24dBm, then determine the distance grade of the SFP module.
- Confirm redundancy requirements: enable dual 5G optical port 1+1 protection on lines where the inter-station optical cable is prone to damage, with the two optical ports as hot standby for each other; where only a single optical cable is available, reserve at least a spare optical module and spare parts.
- Check power supply and environment: DC-48V, AC220V or dual power supply must match the site power; overall power consumption ≤100W, operating temperature 0℃～40℃, humidity ≤90% (non-condensing); installation in a standard equipment room or a temperature-controlled cabinet is recommended.
Conclusion
As an integrated service access device, the 5G optical port integrated service multiplexer IDM OMP4000-4E1-30E aggregates 30 telephones, 4-channel E1 transparent transmission and 4 physically isolated wire-speed gigabit Ethernet interfaces onto one 5Gbps optical fiber. Dual 5G optical port 1+1 protection switches services to the backup channel when the optical fiber is interrupted, and DC-48V/AC220V dual power supply with overall power consumption ≤100W makes it suitable for multi-service over a single fiber access at electric power, rail transit, military and public security, and unattended sites; it can also serve as an access node in PDH and government private network optical fiber communication solutions.
During selection, first count the channels of telephones, E1 and physically isolated gigabit ports, then calculate link loss and check power supply and environmental conditions; include the number of sites at both ends and the optical cable conditions in the list so that quotation and configuration align. For networking solutions and quotations, provide the site list and line conditions to Beijing Ruiguang Jiyuan Digital Technology Co., Ltd.
