IDM OMP3500, Multiservice Access Platform, 2.5G Fiber Integrated Access Device, PCM Voice Data Image Multiplexing Platform, Physically Isolated Gigabit Ethernet Optical Transmission

The IDM OMP3500 2.5G Multiservice Access Platform is a multiservice access device launched by Beijing Ruiguang Jiyuan Digital Technology Co., Ltd. This 2.5G fiber integrated access device simultaneously transmits 16 groups of transparent E1, 2 groups of physically isolated wire-speed Gigabit Ethernet, 4 groups of physically isolated wire-speed 100M Ethernet and 30 channels of narrowband PCM services over 2.5Gbps fiber, and provides 2 groups of 2.5G fiber mutual backup. The IDM OMP3500 integrates telephone, leased-line data and Ethernet access into a single 19-inch standard chassis, replacing multiple stacked single-service optical terminals with one unit, suitable for access points in power, transportation, mining, public security, campus private networks and other scenarios requiring simultaneous voice and broadband services.

The PCM narrowband services of the IDM OMP3500 support voice, data, image and other user interfaces, and service cards can be replaced on-site according to site type; the platform has built-in non-blocking timeslot cross-connection between 2 groups of E1 and all user interfaces, and supports multiple clock modes to meet clock requirements of different application environments. In terms of power supply design, the IDM OMP3500 can simultaneously provide ~220V AC and -48V DC power, and can operate by connecting to the existing power supply system of the equipment room or unattended site.

Figure 1: IDM OMP3500 Multiservice Access Platform overall diagram (19-inch chassis with service slots)

One Device, Multiple Services: IDM OMP3500 Core Functions Overview

The functions of the IDM OMP3500 revolve around 2.5G fiber transmission, TDM services, Ethernet services, protection and NMS. The core functions are as follows:

Function	Description
2.5G Fiber Transmission	Provides 2 SFP 2.5G optical transmission interfaces, single-mode (multi-mode optional), transmission distance 20km/40km/80km optional, supports point-to-point, chain, ring or 1+1 protection networks
16 Groups E1 Transparent Transmission	Provides 16 groups of transparent E1, physical interface CC3-16 or CC3-8, compliant with ITU-T G.703, line code HDB3, interface impedance 75Ω/120Ω
Physically Isolated Wire-speed Gigabit Ethernet	Provides 2 groups of physically isolated wire-speed Gigabit Ethernet, data-plane isolated from 100M port groups, no bandwidth preemption between groups
Wire-speed 100M Ethernet	Provides 4 groups of physically isolated wire-speed 100M Ethernet, supports 10M/100M/1000M auto-negotiation
30 Channels Narrowband PCM	Provides 30 channels of narrowband PCM service access, supports FXS/FXO, magneto, EM, RS232/RS422/RS485, GSM/CDMA and USER universal interface cards
Non-blocking Timeslot Cross-connection	Non-blocking timeslot cross-connection between 2 groups of E1 and all user interfaces, supports multiple clock modes
Dual Optical Port Mutual Backup	2 groups of 2.5G fiber mutual backup; can be configured for mutual backup between fiber and PCM services on one group of E1
SNMP NMS	Supports SNMP Ethernet NMS, can be integrated into the multiservice access device NMS system for unified management
Modular Expansion	19-inch standard chassis, 3 service slots, hot-swappable cards, supports video surveillance and video conference cards
Dual Power Supply	Supports DC-48V, AC220V dual power supply, total power consumption ≤40W

Knowledge Block: Working Principle of the 2.5G Multiservice Access Platform

The 2.5G Multiservice Access Platform is a multiplexing device that multiplexes E1, Ethernet and narrowband PCM services onto a 2.5Gbps fiber for transmission. Taking the IDM OMP3500 as an example, the 2.5G optical bandwidth simultaneously carries 2 groups of Gigabit Ethernet, 4 groups of 100M Ethernet, 16 groups of transparent E1 and 30×64K narrowband PCM services; the 16 groups of E1 are transmitted transparently as-is, and the narrowband PCM services are connected after non-blocking timeslot cross-connection between 2 groups of E1 and all user interfaces. The IDM OMP3500 provides 2 groups of 2.5G optical ports (Fiber A/Fiber B) as mutual backup; when one fiber fails, services switch to the other, supporting point-to-point, chain, ring or 1+1 protection networks.

Figure 2: Device fiber multiplexing principle block diagram (dual 2.5G optical ports with E1, GE, FE, PCM service multiplexing and NMS channel)

Knowledge Block: Physically Isolated Wire-speed Ethernet

Physically isolated wire-speed Ethernet means that each Ethernet port group is completely isolated at the data plane and does not share bandwidth with others; each port forwards independently at the interface line rate (100M or 1000M). The IDM OMP3500 provides 2 groups of Gigabit and 4 groups of 100M, totaling 6 groups of physically isolated Ethernet. Port groups do not preempt bandwidth from each other and can simultaneously carry multiple independent networks such as office network, video surveillance network and production network; Ethernet standard protocol supports IEEE 802.3, with full/half duplex auto-negotiation.

Figure 3: IDM OMP3500 Ethernet and E1 interface panel close-up (GE/FE and CC3 series interfaces)

PCM Narrowband Services and Pluggable Interface Cards

PCM narrowband services are the part of the IDM OMP3500 for telephone and low-speed data access, providing voice, data, image and other user interfaces. Interface cards are configured by capacity per card, as detailed in the table below:

Interface Card Type	Capacity per Card	Applicable Services
FXS/FXO Card	10 or 8 channels per card	Analog telephone subscriber line/trunk line access
Magneto Card	10 or 8 channels per card	Magneto telephone, commonly used in mining and emergency communication
2/4-wire EM Interface Card	4 channels per card	Switch E&M trunk
RS232/RS422/RS485 Card	8 channels per card	Serial data services
GSM/CDMA Card	2 channels per card	Wireless trunk or emergency channel
USER Universal Interface Card	Can mix 4 PCM service modules, up to 2 channels per module	General narrowband services combined on demand

Figure 4: FXS/FXO telephone interface card display (10/8 channels narrowband PCM services per card)

Chassis Structure and Card Expansion

The IDM OMP3500 adopts a 19-inch standard chassis with modular design, providing 3 service slots in the chassis. Service cards support hot-swap, so capacity expansion or card replacement does not interrupt overall device operation; the device uses large-scale ASIC chip design with high integration, and the overall size and power consumption control make it more suitable for direct installation in existing communication equipment rooms. The service slots can mix FXS/FXO, magneto, 2/4-wire EM, RS232/RS422/RS485, GSM/CDMA, USER universal interface cards as well as video surveillance and video conference cards. When site service types change, smooth adjustment can be achieved by replacing cards.

Figure 5: 19-inch chassis with 3 service slots and hot-swappable service card installation diagram

Core Features and Design Highlights

The product features of the IDM OMP3500 are compiled from product documentation as shown in the table below. Specific selection should be confirmed with the manufacturer based on project requirements:

Feature	Description
Multi-service Integration in One Device	30 channels of narrowband PCM, 16 groups of transparent E1 and 6 groups of physically isolated Ethernet transmitted on the same 2.5G platform, reducing device stacking and equipment room space occupation
Dual 2.5G Optical Port Mutual Backup	2 groups of 2.5G fiber mutual backup, and can be configured for mutual backup between fiber and PCM services on one group of E1, forming dual protection
Non-blocking Timeslot Cross-connection and Multiple Clocks	Non-blocking cross-connection between 2 groups of E1 and all user interfaces, multiple clock modes adapt to complex networking clock environments
Card-level Hot-swap Expansion	3 service slots support hot-swap, can accommodate FXS/FXO, magneto, EM, RS232/RS422/RS485, GSM/CDMA, USER universal interface cards and video cards
Industrial Environment Suitability	Operating temperature -20℃~+50℃, dual power supply DC-48V/AC220V, total power consumption ≤40W, suitable for unattended equipment rooms

No differentiated selling point information is currently available in the database; it is recommended to confirm with the manufacturer based on specific project requirements.

IDM OMP3500 Technical Specifications

The technical specifications of the IDM OMP3500 are as follows. Parameters are subject to product documentation, and specific configurations are subject to commercial confirmation; the overall appearance and structure are shown in the figure below.

Figure 6: IDM OMP3500 product main image (19-inch standard chassis and panel appearance, for official website detail display)

Item	Parameter/Specification	Description/Applicable Conditions
Optical Interface Type	SFP	Provides 2 SFP 2.5G optical ports, dual-fiber mutual backup
Fiber Mode	Single-mode (multi-mode optional)	Selected according to line distance
Optical Rate	2.5Gbps	Wavelength 1310/1490/1550nm
Transmit Power	-1~-10dB	Single-mode typical value, subject to actual optical power meter measurement
Receiver Sensitivity	Better than -24dBm	Link budget needs to be verified for long-distance applications
Transmission Distance	20km / 40km / 80km	Corresponds to the selected SFP optical module
E1 Bit Rate	2.048Mbps	Line code HDB3, compliant with ITU-T G.703
E1 Interface Impedance	75Ω/120Ω	Frame structure PCM30/31, transparent mode
E1 Physical Interface	CC3-16 / CC3-8	Corresponds to 16 or 8 groups of E1 output

Ethernet and narrowband service interface parameters are as follows:

Item	Parameter/Specification	Description/Applicable Conditions
Ethernet Transmission Rate	10M/100M/1000M	Supports IEEE 802.3, full/half duplex auto-negotiation
Ethernet Groups	2 groups Gigabit + 4 groups 100M	Physically isolated between groups, wire-speed forwarding
FXO/FXS Audio Range	300Hz~3400Hz	Compression ITU G.711 A-law
FXO/FXS Impedance	Three-element complex impedance 200Ω+560Ω//0.1μF	Loop current 25mA/channel
EM 2/4-wire Audio Range	300Hz~3400Hz	Balanced impedance 600Ω, return loss not less than 18dB
V.24 Interface	Async ≤9600bps; sync 64Kbps	Compliant with CCITT V.28 protocol
V.35 Interface	n×64Kbps (n=0～31)	Interface type RJ-45, compliant with ITU-T V.35, terminal interface compliant with ISO2593

Figure 7: IDM OMP3500 data interface access diagram (V.24/V.35 and E1 services)

Power supply and operating environment parameters are as follows:

Item	Parameter/Specification	Description/Applicable Conditions
Power Supply	DC-48V / AC220V	Dual power supply, can simultaneously provide ~220V and -48V
Total Power Consumption	≤40W	Typical value
Operating Temperature	-20℃ ~ +50℃	Relative humidity 0~95% (non-condensing)
Chassis Structure	19-inch standard chassis	Modular, 3 service slots, hot-swap

Figure 8: IDM OMP3500 dual power supply and equipment room deployment scenario (DC-48V/AC220V)

Typical Application Scenarios and Networking Modes

The IDM OMP3500 supports

FAQ

What services can the IDM OMP3500 transmit simultaneously?

The IDM OMP3500 (hyphenated form IDM-OMP3500 is the same model) 2.5G Multiservice Access Platform simultaneously transmits 16 groups of transparent E1, 2 groups of physically isolated wire-speed Gigabit Ethernet, 4 groups of physically isolated wire-speed 100M Ethernet and 30 channels of narrowband PCM services over 2.5Gbps fiber, and provides 2 groups of 2.5G fiber mutual backup; transmission distance 20km/40km/80km optional, corresponding to the selected SFP optical module, supporting point-to-point, chain, ring or 1+1 protection networks.

How to select the narrowband service interface cards for the IDM OMP3500?

The narrowband PCM services of the IDM OMP3500 support voice, data, image and other user interfaces, and service cards can be replaced on-site according to site type. Interface cards are configured by capacity per card: FXS/FXO card 10 or 8 channels per card, magneto card 10 or 8 channels per card, 2/4-wire EM interface card 4 channels per card, RS232/RS422/RS485 card 8 channels per card, GSM/CDMA card 2 channels per card, USER universal interface card can mix 4 PCM service modules (up to 2 channels per module). The above cards can be hot-swapped in the 3 service slots. Specific selection should be confirmed with the manufacturer based on project requirements.

Will services be interrupted when the fiber of the IDM OMP3500 fails?

The IDM OMP3500 provides 2 groups of 2.5G fiber mutual backup; when one fiber fails, services switch to the other optical port; it can also be configured for mutual backup between fiber and PCM services on one group of E1, forming dual protection. The device provides 2 SFP 2.5G optical transmission interfaces, supporting point-to-point, chain, ring or 1+1 protection networks.

Item	Parameter/Indicator	Description/Applicable Conditions
Ethernet Transmission Rate	10M/100M/1000M	Supports IEEE 802.3, full/half-duplex auto-negotiation
Ethernet Groups	2 groups Gigabit + 4 groups Fast Ethernet	Physical isolation between groups, wire-speed forwarding
FXO/FXS Audio Range	300Hz~3400Hz	Compression per ITU G.711 A-law
FXO/FXS Impedance	Three-element complex impedance 200Ω+560Ω//0.1μF	Loop current 25mA/channel
EM 2/4-Wire Audio Range	300Hz~3400Hz	Balanced impedance 600Ω, return loss ≥18dB
V.24 Interface	Async ≤9600bps; Sync 64Kbps	Compliant with CCITT V.28 protocol
V.35 Interface	n×64Kbps (n=0～31)	Connector type RJ-45, compliant with ITU-T V.35, terminal interface compliant with ISO2593

Figure 7: IDM OMP3500 Data Interface Access Diagram (V.24/V.35 and E1 Services)

Power supply and operating environment parameters are as follows:

Item	Parameter/Indicator	Description/Applicable Conditions
Power Supply Mode	DC-48V / AC220V	Dual power supply, can provide ~220V and -48V simultaneously
Total Power Consumption	≤40W	Typical value
Operating Temperature	-20℃ ~ +50℃	Relative humidity 0~95% (non-condensing)
Chassis Structure	19-inch standard chassis	Modular, 3 service slots, hot-swappable with power on

Figure 8: IDM OMP3500 Dual Power Supply and Equipment Room Deployment Scenario (DC-48V/AC220V)

Typical Application Scenarios and Networking Topologies

IDM OMP3500 supports

FAQ

Which services can be transmitted simultaneously on the IDM OMP3500?

The IDM OMP3500 (hyphenated form IDM-OMP3500 refers to the same model) 2.5G integrated service access platform simultaneously transmits 16 groups of transparent E1, 2 groups of physically isolated wire-speed Gigabit Ethernet, 4 groups of physically isolated wire-speed 100M Ethernet, and 30 channels of narrowband PCM services over a 2.5Gbps optical fiber, with 2 groups of 2.5G optical fibers providing mutual backup; transmission distances of 20km/40km/80km are optional, corresponding to the selected SFP optical module, and point-to-point, chain, ring, or 1+1 protection networks can be formed.

How are narrowband service interface cards for the IDM OMP3500 selected?

The narrowband PCM services of the IDM OMP3500 support various user interfaces including voice, data, and image, and service cards can be replaced on-site according to site type. Interface cards are configured by capacity per card: FXS/FXO cards with 10 or 8 channels per card, magneto ring cards with 10 or 8 channels per card, 2/4-wire EM interface cards with 4 channels per card, RS232/RS422/RS485 cards with 8 channels per card, GSM/CDMA cards with 2 channels per card, and USER universal interface cards that can accommodate 4 PCM service modules (up to 2 channels per module). The above cards can be hot-swapped with power on across the 3 service slots; specific selection should be confirmed with the manufacturer based on project requirements.

Will services be interrupted on the IDM OMP3500 in the event of an optical fiber failure?

The IDM OMP3500 provides 2 groups of 2.5G optical fibers with mutual backup; when one fiber fails, services are switched to the other optical port. It can also be configured so that PCM services on the fiber and one group of E1 back up each other, forming dual protection. The equipment provides 2 SFP 2.5G optical transmission interfaces and can form point-to-point, chain, ring, or 1+1 protection networks.