Netopia Router PN Series - Manual (Page 59)

Configuring ISDN and Leased Line Connections 2-43
Note: For an ISDN switched circuit with HDLC datalink
encapsulation enabled, the Default Profile screen will only show
the Calling Number Authentication pop-up menu.
3. To force incoming calls to match connection profiles, select Must
Match a Defined Profile and toggle it to Yes. Incoming calls that
cannot be matched to a connection profile are dropped. To allow
unmatched calls to be accepted as standard IP or IPX
connections, toggle Must Match a Defined Profile to No.
If Must Match a Defined Profile is set to Yes, the answer profile
only accepts calls that use the same authentication method
defined in the Authentication item. If PAP or CHAP are involved,
the caller must have a name and password or secret that match
one of the connection profiles. The caller must obtain these from
you or your network administrator before initiating the call.
For example, if Must Match a Defined Profile is set to Yes, and
Authentication is set to PAP, then only incoming calls that use
PAP and match a connection profile will be accepted by the
answer profile.
If authentication in the default answer profile is set to CHAP, the
value of the CHAP Challenge Name item must be identical to the
value of the Send Host Name item of the connection profile to be
matched by the caller.
If Must Match a Defined Profile is set to No, Authentication is
assumed to be None, even if you’ve set it to PAP or CHAP. The
answer profile uses the caller’s IP address to match a connection
profile. However, the answer profile cannot discover a caller’s
subnet mask; it assumes that the caller is
not subnetting its IP
address:
Class A addresses are assumed to have a mask of 255.0.0.0
Class B addresses are assumed to have a mask of 255.255.0.0
Class C addresses are assumed to have a mask of
255.255.255.0. Class C address ranges are generally the most
common subnet allocated.
If a remote network has a non-standard mask (that is, it uses
subnetting), the only way for it to successfully connect to the
Netopia Router is by matching a connection profile. In other