User manual

8.4.3 Fallback Settings

The fallback can be used to call out via different routing when the previous call fails. This reduces the

calling failure rate and simplifies the dialing.

z No: Fallback Sequence Number.

If the old number matches more than one rule, the rule of fallback generated number with

smaller sequence number will be dial first. If failed again, the rule of next sequence

number will be dialed, and so on until call connects.

z Old Number: Old dialed number or prefix

Example: You dialed 123456 and failed, you may enter 123456 in the old number for the

fallback function.. You may also enter, for example, 9 as prefix and enable match function,

then every call with the prefix 9 may fallback to the new number.

z New Number ：Fallback new number

Rule: ${EXTEN} represents the dialing number string, ${EXTEN:1} represents dialing

number string with one prefix digit trancated, and 0${EXTEN:1} will add prefix “0”.

Example: If the fallback new number is 654321, you may enter 654321. When 123456

fails, the system will dial the new number 654321.