dslreports logo
site
spacer

spacer
 
    All FAQs Site FAQ DSL FAQ Cable Tech About DSL Distance DSL Hurdles »»
spc

spacer




how-to block ads



Note: This section is out of date and no longer maintained.
It is retained for the value of any residual information contained in it.

DSL - Section 3

More detail.. DSL[2] (Digital Subscriber Line) is a generic name for a family of standards allowing high speed data transfer over telephone lines (POTS), otherwise known as twisted pair. For carrying IP, DSL competes with cable modems, satellite digital data feeds, wireless digital data, ISDN, 56k modems and more expensive frame-relay lines etc.
Since the twisted pair lines used in the telephone network that are to carry DSL are not shielded from interference, there are limits on the distance DSL signals can travel before degrading the maximum DSL speeds available in all DSL standards.
This distance limitation of DSL is only one of many potential technical hurdles to pass before an installation is complete.

..take me back ---- tell me more...

DSL:2

DSL standards are specifically known as SDSL, ADSL, IDSL and a number of less commonly used standards such as HDSL etc. They all work technically in similar ways. The basic principal is to divide up the frequency spectrum that can be carried reliably on twisted pair into two or three bands. One is for upstream traffic, one for down-stream, and the third for some standards is old style voice. Since telephone quality voice represents a fairly small frequency chunk, carrying that capability along with the data is not difficult.


Sections available: 56k modems, ADSL, ATM, ATU-C, ATU-C/R, ATU-R, AWG:, bandwidth, Bell Operating Companies, BERT, BRI, BRIDGE TAP, bridge taps, bridged ips, cable modems, CAP, CBR, CCITT, CIR, CLEC, CLLI, CO, CODEC, Comparing DSL to 56k modems, CPE, CSU, DAML, DCE, DCLEC, DHCP, distance, DLC, DMT, DMZ, DNS services, dsl, DSL, DSL-1, DSL-2, DSL-3, DSL-4, DSL-5, DSL-6, DSL-7, DSL-8, DSL:2, DSLAM, dslam, DSU, DTE, ECHO CANCELLER, extra IPs, family of standards, FDM, filter, firewall, fixed ip, FTTC, FTTH, G.lite, HDSL, HFC, high speed, hub, ICMP, IDSL, idsl, IEC, ILEC, inside wiring, installation, introduction, ISDN, ISP, ITU, IXC, key points, LATA, latency, LEC, lit up, load coil, local loop, loop, maximum DSL speeds, Mbps, MDF, MODULATION, MVL, NAT, NEBS, NEXT, NID, OC48, operating servers, ordering process, packet drops, PCM, pictures, Point of Demarcation, POTS, PPP, PPP vs bridged, PPPoA, pppoe, PPPoE, PRI, private ip, PSTN, PTT, PVC, QAM, RADSL, RBOC, registry settings, router, satellite, SDSL, security, sharing, shielded, SLA, SNR, socks, splitter, SVC, TDM, technical hurdles, terms and conditions, throughput, truck roll, twisted pair, UBR, UDP, UTP, VBR, VDSL, wireless,
WebKbomatic