Verilink AS420 (34-00294) Product Manual - Manual (Page 12)

4 A S 4 2 0 R e f e r e n c e M a n u a l
Specifications
Generic Interface Requirements (120
Ω Ω Ω Ω
and 75
Ω Ω Ω Ω
)
E1 Interface
Line Rate: 2.048 Mbps (± 32 ppm)
Framing: ITU-T G.704 (with or without CRC-4) G.703
Line Code: HDB3
Input Level: E1 to 6 decibels
Pulse Width: 244 (± 41) nanoseconds at half amplitude
Pulse Afterkick: 10 to 30 percent of pulse peak
T1 Interface
Line Rate: 1.544 Mbps (± 32 ppm)
Framing: D4 or ESF
Line Code: AMI or B8ZS
Input Level: 0 to -36 decibels
Pulse Width: 344 (± 45) nanoseconds at half amplitude
Pulse Afterkick: 10 to 30 percent of pulse peak
120
Ω Ω Ω Ω
Termination
Interface: RJ-48C
Impedance: 120
Ω
, balanced
Output Level: 3.0 (± 0.3) volts (base-to -peak)
75
Ω Ω Ω Ω
Termination
Interface: BNC - coax
Impedance: 75
Ω
, unbalanced
Output Level: 2.37 (± 0.24) volts (base-to -peak)
E1 Equipment Interface
N
×
64 kbps rate... for unframed E1: N = 32;
for framed E1 without CAS: N = 1 to 31;
for framed E1 with CAS: N =1 to 15 and 17 to 31
120
Ω Ω Ω Ω
Termination
Interface: RJ-48C
Impedance: 120
Ω
, balanced