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CHAPTER 1: Specifications
17
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)
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)
MS1 Voice/Fax Cards (continued)
MX225C-1 AND MX225C-2