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Note: This section is out of date and no longer maintained.
It is retained for the value of any residual information contained in it. ECHO CANCELLERThese are active devices used by the phone company to suppress positive feedback (singing) on the phone network. They work by predicting and subtracting a locally generated replica of the echo based on the signal propagating in the forward direction. Modems deactivate these devices by sending the 2100Hz answer tone with 180 phase reversals every 450msec at the beginning of the connection.
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,
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