a co-loction query

4 posts by 2 authors in: Forums > CWNA - Enterprise Wi-Fi Admin
Last Post: May 2, 2005:
  • guyz wht i dont get is in the book all these guyz talk bout is channel 1,6,11, if u want 2 have multipl AP wht if we put 2 AP on channel 2,10 or 3,9 or 1,10 etc wht would happen????????????????????

  • Hi Dizzy:

    The standard defines 5 channels of separation for HR/DSSS stations (802.11b) and ERP stations (802.11g) as enough for non-overlapping channel operation. This leads to the familiar 1-6-11 channel choice. If you only need to accommodate two access points then you have many other choices such as those you mention.

    I hope this helps. Could you add your location to your forum profile? Thanks. /criss

  • hi criss,
    thanx a lot for ur reply i didnt get the part in which u mentioned that there r "5 channels in HRDSS" whts HRdss thanx a lot

  • Hi Dizzy:

    HR/DSSS is the name of the PHY (physical standard) introduced by the IEEE 802.11b amendment in 1999. It is more popular to say "802.11b station" than to say "HR/DSSS station". I prefer the more precise name but include the amendment in parentheses.

    Here are all the IEEE 802.11 PHYs, and the documents that describe them:

    IEEE 802.11 Clause 14, FHSS (802.11-1999 base)
    IEEE 802.11 Clause 15, DSSS (802.11-1999 base)
    IEEE 802.11 Clause 16, IR (802.11-1999 base)
    IEEE 802.11 Clause 17, OFDM (802.11a amendment 1999)
    IEEE 802.11 Clause 18, HR/DSSS (802.11b amendment 1999)
    IEEE 802.11 Clause 19, ERP (802.11g amendment 2003)

    One day there will be a new revised base document that incorporates the current base document and amendment documents. It might be named 802.11-2005. After that the amendments we are fond of citing will have vanished, but the clauses and their names will remain.

    I hope this helps. Thanks. /criss

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