ADC HDSL4 Benutzerhandbuch

Line Voltage

0, -185 Vdc, ±123 Vdc (Voltage is applied across Loop 1 and Loop 2.)

CO Supply

-48 Vdc nominal (-42.5 Vdc to -56.5 Vdc) 

See 

Electrical Protection

Secondary surge and power cross-protection on HDSL4 ports. Requires external 
primary protection.

Fusing

Internal; connected to fuse alarm output on pin 10

Operating Temperature

-40°F to +149°F (-40°C to +65°C)

Operating Humidity

5% to 95% (non-condensing)

Height

4.750 in. (12.10 cm)

Width

0.625 in. (1.59 cm)

Depth

10 in. (25.4 cm)

Weight

0.5 lb. (0.23 kg)

Mounting

3192 high-density mechanics shelf

Line Code

784 kbps Overlapped Pulse Amplitude Modulation (OPAM) transmission per pair per 
HDSL4 standard in ANSI T1.418 Issue 2

Transmission

Full duplex

CSA Reach

34 kft. maximum using 26 AWG wire: 12kft. (span 1), 11 kft. (span 2), 11 kft. (span 3)

Media

One non-loaded, copper, four-wire cable pair

Output

+14.1 dBm ±0.5 dBm at 135

Ω 

Line Impedance

135

Ω

Maximum Insertion Loss

Span 1 = 47 dB at 196 kHz
Span 2 and Span 3 = 43 dB at 196 kHz

Maximum Loop Attenuation

Span 1 = 31 dB
Span 2 and Span 3 = 29 dB

Start-Up Time

30 sec. (typical), 1 min. (maximum) 

Line Impedance

100

Ω 

Line Rate

1.544 Mbps ±200 bps

Line Format

Alternate Mark Inversion (AMI) or Bipolar with 8-Zero Substitution (B8ZS)

Frame Format

Extended SuperFrame (ESF), SuperFrame (SF), or Unframed (UNFR)

Pulse Output

6 V

pk-pk

 pre-equalized for 0 to 655 feet of ABAM cable

Input Level

+1.5 to -7.5 dB DSX