A-2
Technical Characteristics
GDC 048R154-000
(Continued on next page)
Item
Characteristic
Electrical (Continued)
Data rates
N x 64 kbps or N x 56 kbps
(N = 1 to 24); maximum aggregate
(payload) rate of 1,536,000 bps
(1,544,000 bps in unframed mode)
Communication line
T1 digital carrier (non-loaded, stag-
gered-twist ABAM, PIC, or pulp-insu-
lated exchange-type cable, 19 to 26
gauge)
Line impedance
100
Ω
Network port physical interface
RJ48C modular jack
Network port physical interface
RJ48C modular jack
Network transmitter
Frequency
1,544,000 bps ± 50 bps
Pulse amplitude — with surge
protection
2.40 to 3.60 V at 60°F — may vary
over a cycle of 60 Hz current.
Unbalance in height of
adjacent negative and positive
pulses
200 mV (maximum)
Width of output pulse (half
amplitude)
324 nsec ± 45 nsec
Unbalance in width of positive
and negative pulses
20 nsec (maximum)
Time between two consecutive
pulses of opposite polarity
648 nsec ± 15 nsec (measured at half
amplitude point of leading edges)
Maximum rise or falling time
100 nsec
Overshoot at trailing edge of
pulse
10% to 30% of pulse amplitude
Line Build-Out
0, 7.5, 15, or 22.5 dB (selectable or au-
tomatic) at 772 kHz
