IDM-120N PCM Multiplexer Equipment

IDM-120N provides 2 shared 10/100Mpbs FE interfaces, 4 transparently transmitted E1 interfaces and at most 120 FXO/FXS interfaces with “caller ID display” feature. IDM-120N also provides 19 slots, which would be able to accommodate 1 MCU (main control unit) card, 16 user’s cards and 2 power cards.

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IDM-120N PCM Multiplexer Equipment

I Description

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II Features

（1). Transmission medium is fiber and the optical line rate is 155Mbps.

1 MCU card and 16 user’s cards, each of which provides 8 channels of 64kbps voice. The capacity of IDM-120N is 120 channels.

（2). 2 10/100Mbps shared FE interfaces with VLAN feature.

（3). Rack-mountable 3U frame, easy to install and maintain.

（4). 4E1 transparent transmissions make it very expandable.

III Specification

Optical interface

Physical connector	FC	Mode	Single mode/Multi-mode
Rate	155bps±50ppm	Wavelength	850nm/1310nm/1550nm
Optical output power	-2~-11dBm	Sensitivity	Better than -36dBm

E1 interface

Physical connector	DB37	Line code	HDB3
Compliance	ITU-T G.703	Impedance	75Ω/120Ω
Framing	PCM30/31	Transmission	Transparent transmission