Search results
Results from the WOW.Com Content Network
Cable modem termination system. A cable modem termination system (CMTS, also called a CMTS Edge Router) [1] is a piece of equipment, typically located in a cable company's headend or hubsite, which is used to provide data services, such as cable Internet or Voice over IP, to cable subscribers.
A fiber optic node has a broadband optical receiver, which converts the downstream optically modulated signal coming from the headend or hub to an electrical signal going to the customers. As of 2015, the downstream signal is a RF modulated signal that typically begins at 50 MHz and ranges from 550 to 1000 MHz on the upper end. The fiber optic ...
Downstream: All versions of DOCSIS prior to 3.1 specify that 64-level or 256-level QAM (64-QAM or 256-QAM) be used for modulation of downstream data, using the ITU-T J.83-Annex B standard [16] for 6 MHz channel operation, and the DVB-C modulation standard for 8 MHz (EuroDOCSIS) operation. DOCSIS 3.1 adds 16-QAM, 128-QAM, 512-QAM, 1024-QAM, 2048 ...
Science & Tech. Shopping. Sports
A wireless site survey, sometimes called an RF (Radio Frequency) site survey or wireless survey, is the process of planning and designing a wireless network, to provide a wireless solution that will deliver the required wireless coverage, data rates, network capacity, roaming capability and quality of service (QoS). [1]
Arris International Limited (styled as ARRIS) is an American telecommunications equipment company engaged in data, video and telephony systems for homes and businesses. [1] On April 4, 2019, Arris was acquired by network infrastructure provider CommScope .
If necessary, an optical amplifier can be used to boost the downstream optical signal to cover a greater distance. The fiber-optic micro-nodes – which are also referred to as RFoG optical-networking units (R-ONUs) – terminate the fiber connection and convert traffic for delivery over the in-home network.
For very low-power systems, such as mobile phones, signal strength is usually expressed in dB-microvolts per metre (dBμV/m) or in decibels above a reference level of one milliwatt . In broadcasting terminology, 1 mV/m is 1000 μV/m or 60 dBμ (often written dBu). Examples. 100 dBμ or 100 mV/m: blanketing interference may occur on some receivers