IDM MSTP155-16 SDH多业务接入平台

---

title: "IDM MSTP155-16 SDH Multi-Service Access Platform"
model: "IDM MSTP155"
category: "SDH"
tags:

• "SDH Equipment"
• "SDH Equipment Features"
• "SDH Equipment Applications"
• "SDH Optical Terminal"
• "SDH Equipment Brochure"
• "SDH Multi-Service Access Platform"
• "MSTP Multi-Service Optical Terminal"
• "Multi-Service Optical Terminal"
• "SDH Optical Terminal"
• "Chain Network Optical Terminal"
  description: "155M optical interface, 19-inch 1U standard chassis, provides 2 STM-1 interfaces, 4 FE interfaces, up to 16 E1 drop channels, 3 universal card 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 for flexible configuration based on requirements; features a TelecomBUS expansion bus for extending Gigabit Ethernet interface cards or 4 groups of physically isolated EOS Ethernet."
  cover: "/images/imports/img-349c861b.webp"
  images:
• "/images/imports/img-349c861b.webp"
• "/images/imports/img-d91b7c51.webp"
• "/images/imports/img-2d6884fe.webp"
• "/images/imports/img-9804ccd4.webp"
  specs:
  "Transmission Distance": "20Km, optional long-distance optical modules available for extended fiber transmission."
  keywords: "SDH equipment,SDH equipment features,SDH equipment applications,SDH optical terminal,SDH equipment brochure,SDH multi-service access platform,MSTP multi-service optical terminal,multi-service optical terminal,SDH optical terminal,chain network optical terminal,ring"
  slug: "idm-mstp155-16-sdh"
  publishDate: "2026-05-12"

Overview:

The IDM MSTP155-16 Multi-Service Access Platform is an STM-1 level multi-service SDH optical transmission system built around SDH and EOS technologies, fully compliant with ITU-T standards. This device provides users with access and transmission for 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 network element timing per ITU-T G.813 standards, VC-12 cross-connection, and channel protection functions. Additionally, the IDM MSTP155-16 can serve as an Add-Drop Multiplexer (ADM) or Terminal Multiplexer (TM) for constructing point-to-point, point-to-multipoint chain, and ring transmission networks. The IDM MSTP155-16 Multi-Service Access Platform is widely applicable in telecommunications data services, power utilities, banking, public security, and military sectors for public telephone network access or dedicated line information transmission.

Product Features:

• 19-inch 1U standard chassis structure, easy to install;
• Integrates SDH, PDH, and IP access functions into one unit, meeting 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 for flexible configuration based on requirements;
• Features multiple clock modes to meet timing requirements in various application environments, including local crystal oscillator clock, line-derived clock, and external clock 2MBIT/2MHZ;
• Comprehensive monitoring and alarm functions. Front panel LEDs display specific alarm statuses, and the device can output alarm information;
• The main unit provides dual optical or dual electrical SDH interfaces, facilitating chain network or redundant ring topology construction;
• Supports point-to-point, chain, and ring networking topologies, and can also be integrated with centralized MSTP systems for combined networking;
• Cross-connection capacity of 128×128 VC-12;
• Supports FC/SFP optical modules 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 and others customizable)	Fiber Mode	Single-mode (multi-mode optional)
Tx/Rx Rate	155M/155M	Tx/Rx Wavelength	1310nm/1550nm
Transmit Power	-15~-8dBm	Receiver Sensitivity	Better than -32dBm
Transmission Distance	20Km, optional long-distance optical modules available for extended fiber transmission.

E1 Interface

Bit Rate	2048Kbps	Line Code	HDB3
Standard Protocol	Compliant with ITU-T G.703	Impedance	75Ω/120Ω
Frame Structure	PCM30/31	Signaling	Channel Associated Signaling

Ethernet

Interface Type	RJ-45	Transmission Rate	N×2.048Mbps (N≤50)
Standard Protocol	Supports IEEE802.3	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 — Using IDM MSTP155-16 to Form a Star Network

The IDM MSTP155-16 device connects via optical fiber with centralized SDH devices to form a star network, allowing remote services to be aggregated at the central site for unified monitoring and management of remote nodes.

Application Example 2 — Using IDM MSTP155-16 to Form a Ring Network

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.