
IDM MSTP155-16 SDH Multi-Service Access Platform
155M optical interface, 19-inch 1U standard chassis, providing 2 STM-1 interfaces, 4 FE interfaces, up to 16 E1 terminations, 3 universal slots supporting 3 service slots, accommodating E1 service cards, FXS/FXO cards, V.24/V.35 cards, Ethernet expansion cards, video cards, and universal service cards, flexibly configured as required; equipped with TelecomBUS expansion bus for extending Gigabit Ethernet interface cards or 4 groups of physically isolated EOS Ethernet.
Overview:
The IDM MSTP155-16 Multi-Service Access Platform is an STM-1 level multi-service SDH optical transmission system built on SDH and EOS technologies, fully compliant with ITU-T standards. This device provides users with access and transmission of multiple services, offering two 155.52Mbps optical interfaces (A and B), up to 18 10M/100M Ethernet interfaces, and 16 groups of E1 interfaces. It features ITU-T G.813 standard network element timing, VC-12 cross-connection, and channel protection functions. Additionally, the IDM MSTP155-16 can serve as an add-drop multiplexer or terminal multiplexer for building point-to-point, point-to-multipoint chain, and ring transmission networks. The IDM MSTP155-16 Multi-Service Access Platform is widely applicable in public telephone network access or dedicated line information transmission for telecom data services, power, banking, public security, and military sectors.


Product Features:
19-inch 1U standard chassis structure for easy installation;
Integrates SDH, PDH, and IP access functions to meet most remote service access requirements;
Supports 3 service slots, accommodating E1 service cards, FXS/FXO cards, V.24/V.35 cards, Ethernet expansion cards, video cards, and universal service cards, flexibly configured as required;
Multiple clock modes to meet clock requirements in various application environments, including local crystal oscillator clock, line-derived clock, and external clock 2MBIT/2MHZ;
Comprehensive monitoring and alarm functions. Panel indicators display specific alarm status, and the device can output alarm information;
The host provides dual optical or dual electrical SDH interfaces for easy chain network or redundant ring topology construction;
Supports point-to-point, chain, and ring networking, and can also be jointly networked with centralized MSTP systems;
Cross-connection capacity of 128×128 VC-12;
FC/SFP optical modules available in optical port mode;
Interoperable with STM-1 optical interfaces of any standard SDH/MSTP equipment;
DC-48V and AC220V power supply options available.
Technical Specifications:
Optical Interface
Connector Type | FC (SC etc. customizable) | Fiber Mode | Single-mode (multi-mode optional) |
TX/RX Rate | 155M/155M | TX/RX Wavelength | 1310nm/1550nm |
Optical Output Power | -15~-8dBm | Receiver Sensitivity | Better than -32dBm |
Transmission Distance | 20Km, optional long-distance optical modules available for extended fiber transmission. | ||
E1**Interface
Line Rate | 2048Kbps | Line Code | HDB3 |
Standard Protocol | ITU-T G.703 compliant | Impedance | 75Ω/120Ω |
Frame Structure | PCM30/31 | Signaling | Channel-associated signaling |
Ethernet
Connector Type | RJ-45 | Transmission Rate | N×2.048Mbps (N≤50) |
Standard Protocol | IEEE802.3 compliant | Operating Mode | Full/half duplex/auto-negotiation |
Power Supply and Consumption
Power Supply | AC220V/DC-48V | Power Consumption | 10W |
Environmental Conditions
Operating Temperature | -15oC ~+50oC | Relative Humidity | 0~95% (non-condensing) |
Product Dimensions
Length×Depth×Height | 440×230×45(mm) |
Application Example 1 Building a Star Network with IDM MSTP155-16
IDM MSTP155-16 devices form a star network with centralized SDH equipment via fiber optics, aggregating remote services at the central site for unified monitoring and management of remote nodes.

Application Example 2 Building a Ring Network with IDM MSTP155-16
Multiple IDM MSTP155-16 devices form a ring network, and the 1+1 channel protection mechanism ensures real-time and accurate transmission of all data and voice services within the ring.

Operating Temperature | -15°C ~ +50°C | Relative Humidity | 0~95% (non-condensing) |
Product Dimensions
Length × Depth × Height | 440×230×45 (mm) |
Application Example 1 Constructing a Star Network Using IDM MSTP155-16
**
The IDM MSTP155-16 devices form a star network with centralized SDH equipment via optical fiber, allowing remote services to be aggregated at the central site for unified monitoring and management of remote nodes.

Application Example 2 Constructing a Ring Network Using IDM MSTP155-16
Multiple IDM MSTP155-16 devices can be deployed to form a ring network. The 1+1 channel protection mechanism ensures real-time and accurate transmission of all data and voice services within the ring network.





