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
