Westermo RedFox Series - Manual (Page 226)

Westermo OS Management Guide
Version 4.17.0-0
– POTS or ISDN carrier: Depending on the kind of telecom network used
to carry your xDSL connection, you should configure the Annex setting
accordingly: ”Annex A, I, L, and/or M” for POTS carrier networks,
or ”Annex B or J” for ISDN carrier networks.
Further details on configuration of the Annex setting:
✯ Annex setting for ADSL over POTS: For ADSL over POTS carrier,
”Annex A” is base annex implicitly available. Other annexes for
POTS (I, L, M, N) are extensions to Annex A. You can specify to only
use Annex A, or you can specify to use additional extensions:
➲ ”Annex A”: The WeOS unit announces capability of Annex A (ADSL
over POTS). This is the default setting of ADSL.
➲ ”Annex I”: The WeOS unit announces capability of Annex A and I.
Annex I allows for additional encoding techniques for ADSL over
POTS.
➲ ”Annex L”: The WeOS unit announces capability of Annex A and L.
Annex I allows for additional frequency bands (at lower POTS fre-
quency), and longer reach.
➲ ”Annex M”: The WeOS unit announces capability of Annex A and M.
Annex I allows for additional frequency bands (at higher POTS
frequency).
➲ ”Annex L-M”: The WeOS unit announces capability of Annex A,
L and M.
✯ Annex setting for ADSL over ISDN: For ADSL over ISDN carrier,
”Annex B” is base annex implicitly available. Annex J is an extension
to Annex B for ADSL over ISDN. You have the following configuration
options:
➲ ”Annex B”: The WeOS unit announces capability of Annex B (ADSL
over ISDN).
➲ ”Annex J”: The WeOS unit announces capability of Annex B and J.
Annex I allows for additional encoding techniques for ADSL over
ISDN.
✯ Annex setting for VDSL: For VDSL it is possible to let the WeOS
unit automatically probe what carrier network is used (by choosing
”Annex A-B”); if this does not work to bring up the VDSL line, one
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