Wireless Router Vs. Modem
Routers and modems are two networking devices, which play a central role in making Internet access possible. Many new Internet users get confused between them.
How are They Different?
In actuality, a modem and a router, aren't directly comparable, as the roles they play are quite different. So, the choice isn't between the two, as they're not mutually exclusive.
Questions have arisen recently on the ability of field-terminated
no-epoxy/no-polish (NENP) connectors to support high-data-rate digital
systems and analog video systems. These questions have resulted in a
number of businesses and campuses installing factory-terminated fibers
through the use of fusion splicers instead of field-terminated fibers.
In tests to judge the ability of field-terminated single-mode NENP
connectors to reliably support high-data-rate (10 Gbps, 40 Gbps) and
analog video systems in a manner equivalent to fusion-spliced,
factory-manufactured connectorized pigtails, four backbone architecture
scenarios were evaluated. These included point-to-point and mesh at
distances of 300 meters to 12 kilometers to compare the high-data-rate
and analog video performances of the single-mode NENP SC connector to a
spliced single-mode SC connector pigtail.
For each scenario, the single-mode NENP SC connectors had -40 dB
reflectance and the single-mode SC pigtails had -55 dB reflectance.
Single-mode NENP SC connectors with -55 dB reflectance were also
included for the analog video system evaluation. Each connector utilized
a flat polished ferrule end-face.
NENP SC connectors and fusion-spliced pigtails were installed on
each backbone cable, while factory-manufactured SC jumpers with -55 dB
reflectance were used for patch panel cross-connects and interconnects.
A certified contractor installed each connector to represent actual
Testing of 10 Gbps was performed at the 1,310-nm wavelength in
accordance with the IEEE-802.310GBASE-LR physical media dependent, using
a standards-compliant transceiver. A minimum average receiver power
level of -14.4 dBm is specified for a bit error rate (BER) of 10^-12. A
stringent pseudorandom binary (bit)sequence (PRBS)of 2^31-1 was used to
generate receiver BER waterfall curves for the comparative analysis.
Testing of 40 Gbps was performed at 1,550 nm using four
time-division multiplex 10-Gbps electrical data signals, with a PRBS of
2^31-1 to generate receiver BER waterfall curves for the comparative
analysis. Analog testing was performed across the 55- to 550-MHz
frequency range using 77 multiplexed RF channels with transmission at
the 1,550-nm wavelength. A 6-MHz band pass filter was used to isolate
channels 2, 9 and 78 to perform the...
The term ‘Modem’. Is actually an acronym for ‘Modulator-Demodulator’. This electronic device converts digital signals to analogue and analogue signals, back to digital form. When you've a cable-based or phone line based connection, the data packets are transmitted over a cable in analogue form, which needs to be converted to digital format. The computer to process. This function is carried out by the modem. It establishes the link with the Internet service provider (ISP) and handles the data transfer, to-and-fro, from the ISP server.
A wireless router is a device that facilitates the integration of multiple computer networks and provides Internet access to computer terminals, through a radio link. it's a wireless transreceiver, attached to the modem on one end and connected with various computer terminals, through a radio frequency carrier link, to provide wireless Internet access. So any data to be transmitted on a network, first arrives at the modem, where it's modulated into a digital signal and then transmitted on a radio carrier signal, by further modulation, via a router.
Modems are differentiated by the amount of data they can transfer per second. Depending on the transmission medium used for transfer of data packets, different modems are used. For example, an ADSL (Asymmetric Digital Subscriber Line) modem is used to modulate and demodulate data over a copper phone line. Many modems are now built with an integrated router, which performs the function of both devices. Choose a high-speed modem for your Internet connection, to speed up downloads. You can have an Internet connection without a wireless router. Not without a modem.
A router is identified by the networking standard, which it’s based upon. The latest and the speediest ones belong to the 802.11n standard, which transmit data over two frequencies and offer speeds in excess of 450 Mbps over the wireless network. They offer simultaneous Internet connectivity to multiple users, by sharing the Internet bandwidth. You can either opt for a modem plus wireless router or a wireless modem, which doubles up as a router.
While home wireless routers are concerned with sharing an Internet connection with multiple users, through a radio link, modems are the devices which establish the connection with the ISP and handle the analogue-to-digital signal conversion. Thus, these two devices are mutually complementary to each other.