Transmission Characteristics
| Cross Talk Attenuation: |
More than 70 dB at 1000 Hz |
| Idle Circuit Noise: |
Less than -65 dBmp |
| Insertion Loss (relative to 1KHz-10 dBm) |
| Station-to-Station: |
Typical 6 dB |
| Station-to-Trunk: |
Typical 0.5 dB |
| Trunk-to-Trunk: |
Typical 0.5 dB at 0 dB PAD control |
Longitudinal Balance
Trunk Side: |
Better than 58 dB |
| PCM Characteristics: |
| Line Rate: |
1.544 Mbps |
| u-Law |
| Law Meets North America TI-D4 Standards |
| Return Loss: |
More than 15 dB (300 ~ 3,400 Hz) |
| Line Impedance: |
| Station: |
600 ohms |
| Trunk: |
600 or 900 ohms |
| Leakage Resistance: |
More than 20,000 ohms |
Rotary Dial Pulse and DTMF Signaling
Rotary Dial Pulse
(1) Receiving Conditions:
Dial Speed: 9 ~ 11 pulses per second (pps)
Break Ratio: 55 ~ 77% (10 pps)
Minimum Inter-digital Pause: 192 ms
Switch Hook Flash Detection: 310 ~ 1610 ms a.
(2) Sending Conditions
Dial Speed: 10 pps (±0.8 pps)
Break Ratio: 67 ±3%
Minimum Inter-digit Pause: 800 ms
DTMF Signaling
(1) Receiving Conditions (Measured at Receiver Input)
Signal Duration: More than 40 ms
Inter-digital Pause: More than 40 ms
Signal Level: 0 ~ -25 dBm
(2) Sending Conditions
Signal Duration: More than 64 ms
Inter-digit Pause: More than 64 ms
Signal Level:
Low Frequency: -10 dBm
High Frequency: - 9 dBm
DTMF Frequencies
| |
1209Hz |
1336Hz |
1477Hz |
| 697Hz |
1 |
2 |
3 |
| 770Hz |
4 |
5 |
6 |
| 852Hz |
7 |
8 |
9 |
| 941Hz |
* |
0 |
# |
Audible Tones and Ringing Signal
Audible Tones
TONE |
FREQUENCY |
INTERRUPTION |
Dial Tone (DT) |
350 Hz mixed with 440 Hz |
Continuous |
Special Dial Tone (SDT) |
350 Hz mixed with 440 Hz |
0.125 sec. ON, 0.125 sec. OFF |
Busy Tone (BT) |
480 Hz mixed with 620 Hz |
0.5 sec. ON, 0.5 sec. OFF |
Reorder Tone (ROT) |
480 Hz mixed with 620 Hz |
2.5 sec. ON, 0.25 sec. OFF |
Howler Tone (HWT) |
2,400 Hz interrupted by 16 Hz |
Continuous |
Service Set Tone (SST) |
350 Hz mixed with 440 Hz |
Continuous |
Ring Back Tone (RBT) |
440 Hz mixed with 480 Hz |
1 sec. ON, 3 sec. OFF |
Hold Tone (HDT) |
480 Hz mixed with 620 Hz |
0.25 sec. ON, 0.25 sec. OFF
0.25 sec. ON, 1.25 sec. OFF |
Second Dial Tone |
440 Hz mixed with 480 Hz |
0.25 sec. ON, 0.25 sec. OFF
0.25 sec. ON, 1.25 sec. OFF |
Call Waiting Ringback Tone |
440 Hz mixed with 480 Hz |
1 sec. ON, 1 sec. OFF |
Message Waiting Indication Tone |
350 Hz mixed with 440 Hz |
0.125 sec. ON, 0.125 sec. OFF |
Ringing Signal
| Frequency: |
20 Hz (Nominal) |
| Signal Voltage: |
75 Vrms (Nominal) |
| Interruption: |
(1) 2 sec. ON, 4 sec. OFF (external calls) |
| |
(2) 1 sec. ON, 2 sec. OFF (internal calls) |
| Distinctive ringing is available for trunk routes and class of service options. |
Heat Dissipation
PIM NO. |
MAX. AC POWER CONSUMPTION (W/H)* |
MAX. BTU (BTU/H) |
1 |
145 |
494 |
2 |
290 |
988 |
3 |
435 |
1481 |
*1 W/H = 3.4056 BTU
| 
