IDM MTP-155 Intelligent Multi-Service Optical Transmission Equipment

1. Overview

The IDM MTP-155 Intelligent Multi-Service Optical Transmission Equipment is developed by Beijing Raytrans Digital Technology Co., Ltd. using advanced international integrated circuits, programmable logic circuits, and high-speed microprocessors. It multiplexes E1 signals, audio signals, telephone/magneto signals, and wire-speed 100M Ethernet signals for transmission over STM-1 (155Mbit/s) fiber optic and E1 channels, supporting intelligent mutual backup between STM-1 optical fiber and E1 link transmission channels.

The IDM MTP-155 Intelligent Multi-Service Optical Transmission Equipment features modular functional design, including SDH optical transmission unit, E1 link interface control unit, EOS unit, PCM unit, SNMP unit, and protection switching unit. It adopts a shockproof, waterproof, and EMC-compliant chassis design, providing service interfaces suitable for military field operations. In addition to the standard configuration of 4 channels of 10/100M Ethernet, 16 channels of E1, 16 channels of 2-wire and 4 channels of 4-wire voice, 1 channel of V.35, 2 channels of V.24, 1 channel of E1 link, and 1 channel of V.35 channel, the equipment also features 4 expansion slots for inserting various service boards.

2. Features

1. Adopts standard 19-inch 3U chassis structure design;
2. The system adopts modular design, and the service access slots are universal, allowing various required services to be connected according to user configuration requirements;
3. Supports intelligent mutual backup function between E1 links and SDH optical links;
4. Supports local telephone switching function, supporting 1~2 channels of E1 digital trunk interfaces (supporting No.7, PRI, and No.1 signaling);
5. Supports SNMP network management protocol, supporting remote equipment service configuration; supports northbound interface, providing alarm information upload;
6. Supports dual hot-backup power supplies; supports replaceable optical ports;
7. Supports STM-1 optical interface, E1 services, FXS/FXO services, magneto services, V.24 services, V.35 services, and Ethernet services;
8. Provides E1 link interface;
9. Provides 5-in-1 2-wire audio card: each board provides 16 channels of 2-wire audio, and each 2-wire audio channel can be configured as FXO/FXS/hotline/magneto/2100Hz magneto mode;
10. All interfaces can be optionally equipped with aviation plug connectors;
11. The equipment features excellent waterproof and moisture-proof design.

3. Main Tactical and Technical Specifications

1. Fiber optic line interface

Ø Quantity: 2 Rate: 155Mbit/s Characteristics: Complies with ITU-T G.957 standard.

2. E1 link interface

Ø Quantity: 1 Rate: 2.048Mbps Characteristics: Complies with ITU-T G.703 standard.

3. Service interfaces:

Ø E1 circuit interface

u Quantity: 16 (75Ω, unbalanced) Rate: 2.048Mbps Characteristics: Complies with ITU-T G.703 standard.

Ø Ethernet interface

u Quantity: 4 Rate: 10M/100M auto-negotiation Characteristics: Complies with IEEE802.3 standard.

Ø V.35 interface

u Quantity: 1 Rate: N×64Kbit/s (n≤30) Characteristics: Complies with ITU-T V.35 standard.

Ø RS232 interface

u Quantity: 2 Rate: ≤19.2Kbit/s Characteristics: Complies with EIA RS232 standard.

Ø 2-wire/4-wire voice interface

u Quantity: 20 channels (4 channels of 4-wire, 16 channels of 2-wire) Rate: 64Kbit/s Mode: hotline, magneto, subscriber, trunk.

4. Order wire interface: 1;
5. Synchronization clock interface: 1 pair, 1 external input clock interface, 1 output synchronization clock interface.
6. Management interface

Ø Interface characteristics: Complies with IEEE 802.3 relevant provisions;

Ø Interface communication protocol: SNMP.

7. The network management system provides a northbound interface, with the capability to access the optical fiber communication transmission network management system;
8. 2M service switching time from optical cable link to E1 link: ≤50ms (using hot backup mode), ≤15s (using dial-up mode to establish E1 link), ≤50s (using integrated network management mode to establish E1 link);
9. Error performance characteristics: Fiber optic link complies with ITU-T G.826 relevant provisions;
10. Equipment power supply mode: AC/DC dual power supply;
11. Equipment dimensions: Height ≤3U, installable in a 19-inch standard cabinet.

4. Technical Specifications

4.1 Optical Interface Technical Parameters

Interface Type      ：	SFP(Hot-pluggable)	Fiber Mode      ：	Single-mode(Multi-mode optional)
Rate              ：	155Mbit/s	Wavelength              ：	1310nm or 1550nm
Transmit Power      ：	-15~-8dBm	Receiver Sensitivity   ：	Better than -32dBm
Transmission Distance      ：	40Km, with optional long-distance optical modules available for extended fiber transmission over greater distances.

4.2 E1 Interface Technical Parameters

Line Code              :	HDB3	Line Rate          :	2048Kbps±50ppm
Impedance              :	70Ω(Unbalanced)	Frame Structure          :	PCM31/30
Signaling              :	Channel Associated Signaling	Jitter Performance      :	Compliant withITU-T G.823
Standard Protocols      :	SupportsITU-T G.703/G.704	Frame Mode          :	Framed/Unframed selectable, timeslots configurable

4.3 Ethernet Interface Technical Parameters

Interface Type      :	RJ45	Interface Rate      :	10M/100M selectable
Standard Protocol      :	Supports IEEE802.3 standard	Operating Mode      :	Half/Full Duplex

4.4 Automatic Telephone Interface Technical Parameters

Ø FXS Interface Performance Specifications

频   带          ：	300~3400 Hz	阻   抗                 ：	(200Ω+560Ω//104)
环路电阻      ：	＜2KΩ	收信电平             ：	-3.5dBr
发信电平      ：	0 dBr	空闲话路噪声      ：	<-65 dBmop
串   音          ：	≤-65 dBmop

Ø FXO Interface Performance Specifications

Frequency   Band          :	300~3400 Hz	Impedance   :	(200Ω+680Ω//104)
Transmit Level      :	0 dBr	Receive Level             :	-3.5dBr
Crosstalk   :	≤-65 dBmop	Idle Channel Noise      :	<-65 dBmop

4.5 Magnet Ringing Telephone / 2100Hz Magnet Ringing Telephone Interface Specifications

Frequency   Band          :	300~3400 Hz	Impedance   :	600Ω
Transmit Level      :	0 dBr	Receive Level             :	-3.5dBr
Crosstalk   :	≤-65 dBmop	Idle Channel Noise      :	<-65 dBmop

4.6   Hotline Telephone Interface Specifications

频   带          ：	300~3400 Hz	阻   抗                 ：	600Ω
环路电阻      ：	＜2KΩ	收信电平             ：	-3.5dBr
发信电平      ：	0 dBr	空闲话路噪声      ：	<-65 dBmop
串   音          ：	≤-65 dBmop

4.7 RS232/RS485 Interface Specifications

Asynchronous Rate      :	<=19.2K adaptive	Synchronous Rate      :	64K
Interface              :	Compliant withITU-T   RS232 andITU-RS485 interface standards

4.8 V35 Interface Specifications

Rate       :	N*64K  N<=32	Mode       :	SupportsDCE and DTE modes
Interface       :	Complies withITU-T  V.35 interface standard

5. Environmental Specifications

5.1 Operating/Storage Environment

Ø Temperature (℃): -25℃～55℃

Ø Storage temperature: -40℃～75℃

Ø Relative humidity (%): ≤95%, non-condensing

5.2 Operating Power Requirements

The equipment supports AC 220V and DC -48V/DC 24V power input.

Ø AC voltage: 187V~253V

Ø DC voltage: DC -38V~-58V / DC -19V~-28V

6. Application Example

In the application solution, an IDM intelligent multi-service optical transmission device is deployed at both the central office and remote end respectively. The transmission line adopts 155M (STM-1) and E1 links as mutually backup transmission channels. The central office can access the telephone switching network via FXO analog trunk or E1 digital trunk, and access the IP network via the Fast Ethernet interface, while also providing access for V.35, V.24, hotline telephone, ordinary telephone, E1, and four-wire audio services.

The remote device can be deployed at a base site or installed on a communication vehicle, providing access for V.35, V.24, hotline telephone, ordinary telephone, E1, four-wire audio, and Ethernet services.

When the optical fiber transmission channel is in good condition, all services are transmitted through the 155M optical fiber, with Ethernet service bandwidth configured in 2M granularity, capable of providing N×2M high-bandwidth Ethernet service transmission. When a fiber fault occurs, the equipment automatically switches to the E1 link channel, enabling transmission of designated 64K and N×64K services over the E1 channel, with Ethernet service bandwidth configured in 64K granularity, capable of providing N×64K low-bandwidth Ethernet service transmission. When the optical fiber channel fault is restored, the equipment automatically switches all services back to fiber transmission.