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Subscriber cable modems
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Subscriber cable modem ARRIS TOUCHSTONE 550A

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Touchstone Cable Modem 550A - DOCSIS 2.0 is a cable modem providing high-speed services of data transmission in hybrid (fiber-optic/coaxial) networks of cable TV.

Advantages:

  • Allows operators to decrease service costs;
  • Attractive and compact design;
  • It allows operators to maximize profits with the help of offering of high-speed access for the user;
  • Possibility of simultaneous operation of two users (one connects as per USB, another connects as per Ethernet) without additional network equipment;
  • Time for line output after RF cable breakdown for 1-30 sec/ amounts 5.3 sec. (Motorola 5100 - 10.3 sec.);
  • High stability (0.0001 rebooting per year, i.e. 1 reboot per 10000 modems/year);
  • It operates well in the noise networks;
  • It operates in networks with DOCSIS 1.0, DOCSIS 1.1, DOCSIS 2.0;
  • It offers high-speed services of data transmission via 10/100 Base-T Ethernet bridge and fully speed USB 1.1 (12 Mbit/s);
  • 70% improved efficiency that leads to reduction of CPU loading and increase of efficiency of direct (DS) and return (US) channels;
  • Improved scanning algorithm compared to modems of Touchstone CM450 generation; Compact sizes;
  • In accordance with directive of European Restriction of Hazardous Substances (RoHS) – reduced content of lead and other heavy metals at producing modems;
  • Indicators easy for understanding;
  • Horizontal and vertical variants of setting – built-in movable lug for stability in vertical position and integrated bracket to mount to wall;
  • Local power supply;
  • Superb band transmission;
  • Installation helps at web-server Touchstone.

Specifications

Range of operating temperatures, °C

from 5 to 40

Relative humidity (without condensate), %

from 5 to 85

Color

Dark grey

Dimensions (height × length × depth), cm

17.2 × 16.3 × 3.0

Weight, kg

0.9 kg in packing

Diagnostics LEDs

Power, DS, US, ONLINE, LINK

Interfaces

Radio frequency interface

F-connector

Data interfaces

10/100 Base-T Ethernet (RJ-45 connector), USB 1.1 Series B-connector

Power supply

200 - 240 V AC 50 Hz, 9 W

Radio-frequency path

Direct channel

Frequency range, MHz

88 - 860

Bandwidth, MHz

6

Modulation (QAM)

64 or 256

Data transmission rate (max.), Mbit/s

30.34 or 42.88

Input resistance, Ohm

75

Level of input sensitivity of radio-frequency path, dBmV

-27 (64QAM) up to +15

Return channel

Frequency range, MHz

5-42

Bandwidth, kHz

A-TDMA: 200, 400, 800, 1600, 3200 и 6400 kHz; S-CDMA: 1600, 3200, 6400 kHz

Modulation

QPSK, 8QAM, 16QAM, 32QAM, 64QAM, 128QAM (only for S-CDMA)

Transmission rate, Mbit/s

Up to 30.72

Output level of radio-frequency path, dBmV

A-TDMA: +8 to 54 dBmV (32QAM, 64QAM); +8 to 55 dBmV (8QAM, 16QAM); +8 to 58 dBmV (QPSK); S-CDMA: +8 to 53 dBmV (all modulations)

Automatic level control

available

Attenuation level control, dB

50

Frequency stability, kHz

± 5

Output level, Ohm

75

Standards

DOCSIS 2.0 compatible

DOCSIS 1.1 compatible

UL 60950

FCC Part 15 Class B

CE

WHQL