  (Ū MP (RFC 1717) Υݡ)
  Ʊ PPP ͭˤơΥץȥȤĤ 
  ISDN ³ޤȤ뤳Ȥˤꥹ롼ץåȤä뤳
  Ǥޤܺ٤Documentation/isdn/README.syncppp 
  ߤ

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