Capacity |
| Channels
Per Line |
4 |
| Channels
Per Shelf |
64 |
Digital Subscriber Line (DSL) Interface |
| Line
Code |
2B1Q |
| Data
Bit Rate |
160
Kbps |
| Transmission
|
2-wire
full-duplex synchronous with adaptive echo cancellation
and equalization |
| Loop
Resistance |
1300
maximum |
| Impedance |
135
|
| Line
Attenuation |
42
dB @40 KHz |
VF Exchange Interface (2-Wire Loop Start Interface)
|
| Input
Impedance |
Customizable;
standard = 600 |
| Input
Signal Level |
3
dBmO maximum |
| Loop
Current |
20
to 70 mA |
| Ring
Voltage |
35
to 150 Vrms |
| Ring
Frequency |
20
to 25 Hz |
VF Subscriber Interface (2-Wire Loop Start Interface)
|
| Input
impedance |
Customizable;
standard = 600 |
| Input
Signal Level |
3
dBmO maximum |
| Loop
Current |
20
mA |
| On-Hook
DC voltage |
-24
or -48 VDC |
| RT
Loop Resistance |
820
(including telephone set) |
| Ring
Voltage |
45
Vrms |
| Ring
Load |
4
REN per channel |
| Dialing
signal |
Pulse
or DTMF |
Transmission |
| Insertion
Loss |
2.5
dB + 0.5 |
| Return
Loss |
>
18 dB |
| Channel
Cross Talk |
<
-65 dBmO |
| Idle
Channel Noise |
<
-65 dBmOp |
| S/N
Ratio |
>
33 dB @1 KHz, O dBmO input level |
Metering Pulse Interface |
| Meter
Pulse Frequency |
16
or 12 KHz + 1% |
| Valid
Frequency |
16
or 12 KHz + 5% |
| Valid
Level |
2
to 22 Vpp on tip and ring |
| RT
Meter Pulse Signal |
16
or 12KHz +1% |
| RT
Meter Pulse Level |
10
Vpp |
Contact Taicom
