1

What determines whether a gateway does digit-by-digit matching?

Answer:

A gateway uses digit-by-digit matching if the incoming dial peer is not configured for direct-inward-dial. If the incoming dial peer is configured for direct-inward-dial, the entire digit string is matched. The exception is if the incoming call is ISDN with overlapping receiving.

2

What is the default order of operation for matching outbound dial peers?

Answer:

Most specific match is the first selection. If two equivalent matches exist, the peer with the highest configured preference is selected. If preferences are equal, the selection is random.

3

What is necessary for a dial peer to be considered operational?

Answer:

You must configure the dial peer with an answer address or an incoming called number or both a destination pattern and a target.

4

Which factors must you balance when designing a dial plan?

Answer:

You must balance ease of use for end users with administrative overhead and scalability.

5

What end-user issue can be caused by an overlapping dial plan?

Answer:

An overlapping dial plan requires the interdigit timer to expire before the appropriate route pattern can be selected. This results in a long post dial delay. You can minimize this issue by reducing the interdigit timer or by training users to use the # to indicate they have entered all digits.

6

What is the default dial peer?

Answer:

The default dial peer is a system dial peer that is used to match inbound calls if the call does not match a configured dial peer.

7

Which number is used to match the destination pattern on a dial peer?

Answer:

For inbound dial peers, the calling number (ANI) is used to match the destination pattern. For outbound dial peers, the called number (DNIS) is used to match the destination pattern.

8

How are dial peers configured to accommodate an overlapping dial plan?

Answer:

For the dial peers that have overlapping destination patterns, you need to add a T to the end of the digit string. This signifies that the digit matching should not occur until the interdigit timer expires.

Категории