IDM-120N 60-Channel Telephone Optical Terminal
The IDM-120N 60-Channel Telephone Optical Terminal is a PCM integrated service optical transmission equipment designed with dedicated large-scale integrated circuits. It offers a total optical bandwidth of 155M, 2 shared 100M Ethernet ports, 4 E1 transparent transmission interfaces, and 120 telephone user lines. It supports dual power and ringing current board backup as well as hot-swappable components.
Overview:
The IDM-120N 60-channel telephone optical terminal is a PCM integrated service optical transmission equipment designed by our company using dedicated large-scale integrated circuits. It has a total optical transmission bandwidth of 155Mbps and provides 2 shared 100Mbps Ethernet interfaces, 4 E1 transparent transmission interfaces, and 120 telephone user lines. The E1 transmission channel complies with the G.703 standard and uses the PCM30/31 format; FXO and FXS interfaces support polarity reversal and caller ID functions. This equipment also features dual backup and hot-swappable power and ringing boards, greatly ensuring the reliability of service transmission. The IDM-120N telephone optical terminal can be widely used in public telephone network services for telecom and network operators, as well as dedicated information data services for power, banking, public security, and military applications.
Product Features:
- 4 E1 transmission interfaces;
- 2 shared 100Mbps Ethernet interfaces;
- 16 user interface slots provided;
- Reserved multifunctional board slots for flexible expansion, supporting any network topology;
- Complete function control switches and alarm indication functions;
- Simple and comprehensive network management functions, allowing online real-time configuration, query, and fault statistics management;
Configuration Table:
| Item No. | Name | Model | Description | Quantity |
| 1 | Equipment Frame Backplane | IDM-120 | 19-inch 3U frame, providing 19 board slots | 1 |
| 2 | E1 Interface Main Control Board | CMU-E1-120 | Provides E1 interface access | 1 |
| 3 | Optical Interface Main Control Board | CMU-120 | Provides 1 optical interface access. 2 100Mbps Ethernet interfaces, 4 E1 interfaces | 1 |
| 4 | Power Board | PRU-120 | Provides 1+1 power supply for the entire unit. For the FXO side, -48V input | 2 |
| 5 | Power and Ringing Board | RPRU-120 | Provides 1+1 power supply and ringing voltage for the entire unit. For the FXS side, -48V input | 2 |
| 6 | FXO Service Board | 8FXO-120 | 8 FXO interfaces, exchange side | 16 |
| 7 | FXS Service Board | 8FXS-120 | 8 FXO interfaces, user side | 16 |
In a single device configuration, only one of items 2 and 3 can be selected;
Technical Specifications:
Optical Interface
| Interface Type | FC (SC and others can be customized) | Fiber Mode | Single-mode (multi-mode optional) |
| Fiber Rate | 155bps±50ppm | Wavelength | 1310nm |
| Transmit Power | -2～-11dBm | Receiver Sensitivity | Better than -36dBm |
E1 Interface
| Bit Rate | 2048Kbps | Line Code | HDB3 |
| Standard Protocol | Supports ITU-T G.703 | Impedance | 75Ω/120Ω |
| Frame Structure | PCM30/31 | Signaling | CAS (Channel Associated Signaling) |
Ethernet
| Interface Type | RJ-45 | Transmission Rate | 10/100Base-T 10M/100M |
| Standard Protocol | Supports IEEE802.3 | Operation Mode | Full/Half-Duplex/Auto |
FXO/FXS Interface
| Audio Range | 300Hz~3400Hz | Impedance | Complex impedance 200Ω+560Ω//0.1μF |
| Compression Rate | ITU G.711 A-law | Loop Current | 25mA per line |
Power and Power Consumption
| Power Supply | DC -48V or AC 220V | Total Power Consumption | ≤250W |
Environmental Conditions
| Operating Temperature | 0°C ~+40°C | Humidity | 95% non-condensing |
Product Dimensions
| Length × Depth × Height | 480×200×132(mm) |
Application Example:
Quotation for 60-channel telephone optical terminal, manufacturer of 60-channel telephone optical terminal
