Call acceptance scenarios

8-6 User’s Reference Guide

CNA should be available where CallerID services are available. You will need to consult with your telephone service provider to ﬁnd out if your line is provisioned for CallerID.

Also note that if the calling side has instructed the phone company to block delivery of its caller ID, the answering side will not be able to authenticate.

If your line does not support the appropriate service, CNA may not work properly.

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 words, you will have to set up a connection proﬁle for that network.If Must Match a Deﬁned Proﬁle is set to No, you can also set the following parameters for accepted calls that do not match a connection proﬁle: