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Technical Specifications
DHG544B
VoIP
Cable Modem
Standards / Certifications
Data DOCSIS 2.0 certified
Voice PacketCable 2.0 certified
CMTS Interoperability Any qualified DOCSIS CMTS
Receiver
Downstream Modulation QAM 64/256
Downstream Frequency Range 88-860 MHz , 1GHz tuning
capabilities
Maximum Downstream Data
Range
30.34/42.88 Mbps
(QAM 64/ QAM 256)
Input Signal Level Range -15 to +15 dBmV (QAM 64)
-15 to +15 dBmV (QAM 256)
BER <1x10-8 @ C/N=23,5dB, QAM 64
with FEC,
<1x10-8 @ C/N=30dB, QAM 256
with FEC,
received power = -6dBmV
to +15dBmV
<1x10-8 @ C/N=33dB, QAM 256
with FEC,
received power = -15dBmV to
–6dBmV
Input Impedance 75 Ohm
Transmitter
Upstream Modulation QPSK and 16 QAM
Additional Upstream Modulation
Types
QAM 8/32/64 for A-TDMA and
QAM 128 for S-CDMA channels
Upstream Frequency Range 5-42 MHz
Maximum Upstream Data Range 30.72 Mbps (QAM 64)
Output Signal Level Range A-TDMA:
+8 to +58 dBmV/QPSK
+8 to +55 dBmV @ QAM 8/16
+8 to +54 dBmV @ QAM 32/64
S-CDMA:
+8 to +53 dBmv/All
Output Impedance 75 Ohm
Channel Bandwidth Programmable (200*N KHz)
N=1, 2, 4, 8, 16, 32
Automatic Level Adjust yes
Gain Control Range 50dB
Frequency Stability ± 5 kHz
Telephony Features
Audio Codecs PCM A-law, PCM μ-law, G.729,
G.729a, G.729e,
G.728, iLBC and BV16
Multi-line Phone Support Yes, Two phone lines, three-party
conference calls, can support two
complex voice codecs simultaneously
Fax Relay T.38
DTMF Tone relay RFC2833
Caller ID Type I and Type II
CLASS features BASIC and Extended CLASS
features
VAD (Voice Activity Detection) yes
CNG (Comfort Noise Generation) yes
Echo cancellation G.165/G.168 up to 16ms
Packet Tone DTMF generation/Call Progress
Generation/Custom Tone Generation
Call discrimination Fax and Modem Detection
Telephony interface capabilities Loop-back and on demand diagnostic
Modems Up to V.90 (38.5kbps)
RFC2833 DTMF Tone relay Enabled/disabled via SNMP and
Telnet
REN 5 REN
Pulse dialing DTMF tones to pulse tones
conversion and pulse to DTMF tones
conversion
VoIP Call Control
RTP layer RFC1889/RFC1890
RTCP statistics collection yes
PacketCable Protocols Protocol (PKT-SP-EC-MGCP)
PC Compatible
CPU 486DX 66MHz
(Pentium Preferred)
Memory RAM 16MB (32MB Preferred)
Operating Systems Windows 7, Vista, XP,
Me and 2000
Available Disk Space 76 MB
Sound Card 16-Bit
Video VGA (SVGA Preferred)
Ethernet Port 10/100 Base-T
Drive CD-ROM