Black Box 5000 manual Signaling Specifications, Digital Specifications

MS1 Voice/Fax Cards (continued)

MX225C-1 AND MX225C-2

Signaling Specifications

Formats —

Dial Pulse: ≤3% distortion @ 10 pulses per second

Dual Tone Multifreq: ≤1% distortion

Steady DC (E&M): Types I, II, III, IV, and V

Single Frequency: 2280 Hz (AC15) on E&M 4 wire interface only

Pulsed DC (RonTron): E&M interface only

NOTE: Both ends must use the same signaling format

KTS Interface —

Loop Range: 400 Ω (2000 feet on 24 AWG wire pair)

Ringing Source: 25 or 50 Hz ±2 Hz, 40 Vrms into 2 ringers

Ring Cadence: Repeated ring (matches ringing cadence from remote voice/fax channel), interrupted ring 2/4 (2 seconds on, 4 seconds off), or interrupted ring 2 1/2 (ring two times for 0.4 second separated by .02 second, and then be off for two seconds)

OPX Interface —

Loop Range: 900 Ω (6500 feet on 24 AWG wire pair)

Ringing Detection: 19 to 33 Hz at 40 to 90 Vrms

E&M Interface —

Loop Range: 400 Ω (2000 feet on 24 AWG wire pair)

CHAPTER 1: Specifications

Digital Specifications

Channel Digitizing Rates — 4.8, 6.4, 7.2, 8, 9.6, 12, 14, and 16 Kbps

Fascimile Rates — Group III fax at 9.6, 7.2, 4.8, and 2.4 Kbps, not to exceed channel digitizing rate

Link Error Rate —

Circuit Degradation @ ≤1 bit in 100,000 Circuit Unacceptable @ ≤1 bit in 10,000

Mean One-Way Propagation Time —

≤180 ms for voice (excluding link propagation) ≤253 ms for fax (excluding link propagation)

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