---

title: "IDM 120N-GP Ultra-Broadband Integrated Service Optical Fiber Multiplexing Equipment"
model: "IDM 120N"
category: "Telephone Optical Terminal"
tags: [
"Gigabit Ethernet Telephone Optical Terminal",
"Integrated Service Optical Terminal",
"1000M Ethernet Telephone Optical Terminal",
"Physically Isolated 1000M Ethernet Telephone Optical Terminal",
"120-Channel Telephone Optical Terminal"
]
description: "Provides 2 2.5G SFP optical interfaces with 1+1 optical port protection; offers 120 standard-defined FXO/FXS interfaces; provides 2 independent wire-speed 1000M Ethernet interfaces; supports 4 groups of E1 interfaces in transparent transmission mode; features comprehensive function control switches and alarm indication functions. Equipped with complete and user-friendly network management functions, enabling real-time online query, fault statistics, and management of the equipment."
cover: "/images/imports/img-a41343c0.webp"
images: [
"/images/imports/img-a41343c0.webp",
"/images/imports/img-93dc07f2.webp",
"/images/imports/img-ef9d7d5e.webp",
"/images/imports/img-08b28c89.webp"
]
keywords: "Gigabit Ethernet Telephone Optical Terminal,Integrated Service Optical Terminal,1000M Ethernet Telephone Optical Terminal,Physically Isolated 1000M Ethernet Telephone Optical Terminal,120-Channel Telephone Optical Terminal"
slug: "idm-120n-gp"
publishDate: "2026-05-12"

I. Overview

The IDM 120N-GP Ultra-Broadband Integrated Service Optical Fiber Multiplexing Equipment is one of the PCM integrated service transmission equipment series designed by our company using large-scale integrated circuit technology. This equipment utilizes standard optical fiber transmission channels (G.703 standard) and adopts the PCM30/31 format, providing dual-fiber backup and directly offering 64K service interfaces, wire-speed 1000M Ethernet, E1, and various other user interfaces. Additionally, the equipment features easy installation and is capable of meeting the requirements of various application environments.

II. Product Features

Ø Standard 19-inch 3U chassis architecture for easy installation;

Ø Provides 2 2.5G SFP optical interfaces with 1+1 optical port protection;

Ø Offers 120 standard-defined FXO/FXS interfaces;

Ø Provides 2 independent wire-speed 1000M Ethernet interfaces;

Ø Supports 4 groups of E1 interfaces in transparent transmission mode;

Ø Features comprehensive function control switches and alarm indication functions.

III. Technical Specifications

Optical Interface

Interface Type	SFP	Fiber Mode	Single-mode(Multi-mode optional)
Fiber Rate	2.5Gbps	Wavelength	1310nm/1550nm
Transmit Power	-1~-3dBm	Receiver Sensitivity	Better than-24dBm

E1 Interface

Line Rate	2048Kbps	Line Code	HDB3
Standard Protocol	SupportsITU-T G.703	Impedance	75Ω
Frame Structure	PCM30/31	Mode	Transparent

Ethernet

Interface Type	RJ45	Transmission Rate	10M/100M/1000M
Standard Protocol	SupportsIEEE802.3	Operating Mode	Full/Half Duplex/Auto-Negotiation

FXO/FXS Interfaces

Audio Range	300Hz~3400Hz	Impedance	Three-element Complex Impedance200Ω+560Ω//0.1μF
Companding Law	ITU G.711A-law	Loop Current	25mA/channel

Power Supply and Power Consumption

Power Supply Mode

DC-48V /AC 220V/Dual Power Supply

Total Power Consumption

≤100W

Environmental Conditions

Operating Temperature

0ºC～40ºC

Humidity

≤90%（non-condensing）

4. Typical Applications