User`s guide

DOXport 1110 Specifications 19
DOXport 1110 Specifications
The Com21 DOXport 1110 cable modem complies with DOCSIS specifications. Table 4 lists
detailed operating and environmental specifications.
Table 4:
Specifications
Parameter Specification
DOWNSTREAM
Demodulation 64QAM/256QAM
Physical speed 30 Mbps (64QAM) / 43 Mbps (256QAM)
Error correction Reed Solomon + Trellis (Enhances Annex B)
Frequency range 88 MHz to 860 MHz (edge-to-edge)
Bandwidth 6 MHz
Input signal level -15dBmV to +15dBmV
Input impedance 75 ohms
Return loss > 6 dB from 88 MHz to 860 MHz
UPSTREAM
Modulation QPSK /16QAM
Physical speed
320, 640, 1280, 2560, 5120 Kbps (QPSK)
640, 1280, 2560, 5120, 10240 Kbps (16QAM)
Error correction Reed Solomon
Frequency range 5 to 42 MHz (edge-to-edge)
Bandwidth 200, 400, 800, 1600, 3200 kHz
Output signal level
+8 dBmV to +58 dBmV (QPSK)
+8 dBmV to +55 dBmV (16QAM)
SNMP MANAGEMENT
MIB Group MIB II, MCNS MIB
INTERFACES
Ethernet 10/100 Base-T (full duplex), RJ-45 Connector
Cable F type female connector, 75 ohm
USB USB 1.1, B-Type female connector