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Difference between ADSL annex-A and annex-B?

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wappyboy Posted messages 2 Registration date   Status Member -  
brupala Posted messages 111118 Registration date   Status Member Last intervention   -
Hello,

I need to quickly buy a Linksys access point and I'm not sure which one to choose (I just want to connect my router to ADSL and then share a printer and the connection with 6 computers)

I have the following options:
LINKSYS WAG160N-E1
router, LAN (4x 10/100 BaseT), WAN (ADSL (Annex-B)), WLAN (802.11b/802.11g/802.11n, WEP/WPA/WPA2)

LINKSYS WAG160N-EU
router, LAN (4x 10/100 BaseT), WAN (ADSL (Annex-A)), WLAN (802.11b/802.11g/802.11n, WEP/WPA/WPA2)

LINKSYS WRT610N
router, LAN (4x 10/100 BaseT), WLAN (802.11a/802.11b/802.11g/802.11n, 270mbps, WEP/WPA/WPA2)

I don't see what their differences are.. except for Annex-A or Annex-B which I don't know what it is!

Thank you for your help

2 answers

  1.
    brupala Posted messages 111118 Registration date   Status Member Last intervention   14 437
     
    Hello,
    in France, you shouldn't be able to buy Annex B ADSL equipment (over ISDN), as it was never installed by FT.
    read:
    There are two variants of ADSL used depending on whether the subscriber line is an analog telephone line (in this case, we use Annex A ADSL) or a line operated over ISDN (in this latter case, we use Annex B). The paragraphs above described the distribution of sub-carriers for Annex A ADSL. Since the frequency range used by ISDN is broader than that for conventional telephony, reaching up to a hundred KiloHertz, Annex B reserves more unused sub-carriers in the lower band, and shifts the boundary between the sub-carriers used for upstream and those used for downstream accordingly. Annex B is used in Germany, for example, where most lines in the public telephone network are operated over ISDN.

    excerpt from: https://fr.wikipedia.org/wiki/Asymmetric_Digital_Subscriber_Line
    if you are in France you absolutely need to get a Annex A ADSL modem.
    because if you have an ISDN line, FT will never install ADSL on it :-(
    PS:
    the WRT router does not have a built-in ADSL modem; you need an external Ethernet modem.
    --
    and ... There you go!
    3