Black Box 5000 manual MS1 Voice/Fax Cards, General Specifications, Analog Specifications

Multiserver 5000

MS1 Voice/Fax Cards

MX225C-1 AND MX225C-2

General Specifications

Channels per Voice/Fax Card —

MX225C-1: One channel

MX225C-2: Two channels

Signals Supported — Analog voice and Group III fascimile (fax)

Telephone Interfaces —

PBX tie trunk: E&M Types I through V, 2-wire or 4-wire;

PBX station or Central Office PSTN: OPX Loop Start, 2-wire;

Key telephone systems, telephone set or PBX CO Trunk: KTS Loop Start, 2-wire;

Compatible Connections: OPX to KTS;

E&M to E&M; E&M to KTS; KTS to KTS (ring- down)

Interface Connectors — RJ-11 modular jack for KTS- and OPX-type interfaces; 8-pin terminal block for KTS, OPX, and E&M type interfaces

Indicators per Channel —

OK	-	OK
LO	-	Local Off-Hook
RO	-	Remote Off-Hook
LS	-	Local Speech
RS	-	Remote Speech
TM	-	Test

Diagnostics — Self-Test, Loopback, and Input Level Display

Analog Specifications

Insertion Loss — 2 dB nominal @ 1000 Hz (End-to- End)

Audio Levels —

Input/Output Levels: 0 dBm maximum

Adjustable Range: +28 dB to –28 dB in steps of 1 dB

Frequency Response — 300 Hz to 3000 Hz @ +1.5 dB/-2 dB

Idle Channel Noise — ≤22 dBrnC

Non-Linear Distortion — Second Harmonic ≥40 dB below Signal; (4 tone method): Third Harmonic ≥40 dB below Signal

Signal to Noise Ratio — ≥37 dB

Input Impedances —

E&M 4-wire, E&M 2-wire, KTS 2-wire: 600 Ω, ±10 percent, balanced

OPX 2-wire: 600 Ω nominal

Return Loss —

Echo Return Loss: ≥20 dB

Singing Return Loss:

Low: ≥14 dB

High: ≥14 dB

Longitudinal Balance — 200 to 1000 Hz: ≥58 dB 1000 to 3000 Hz: ≥53 dB

Echo Canceling — ≤4 milliseconds (≤150 miles)

Echo Suppression — ≥ 35 dB

Crosstalk (near/far end) —

E&M 4 wire: ≥75 dB transmit to receive;

between channels: ≥75 dB

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