The $retry_partial command is used to specify how partial retries may be used. The default is to allow partial retries provided that the retry is made within one hour of a partially successful transmission. You can set any time limit after which the system will revert to full retry, which prevents the last few pages turning up at your recipient's fax several hours after the first part of the transmission. You can also specify the number of pages or proportion of the fax that must have already been sent before you will consider a partial retry. This can be used, for example, always to force a full retry if only one or two pages of a 20-page fax have been sent successfully.
When choosing a time limit for $retry_partial, you must make sure that it is long enough to allow for the retry to to be scheduled and the FS file to be picked up for processing. The time limit should therefore always be longer than the delay times specified on $retry_delays, and longer still if the $retry_tosend command specifies a lower priority TOSEND queue than first-time transmissions. We recommend that when using partial retries, you should specify a higher priority TOSEND queue on $retry_tosend, to ensure that the recipient does not experience long delays between successive partial transmisssions.
Note that a retry attempt can only be considered as potentially a partial retry when it is part of a sequence of attempts specfied by $retry_delays. A partial retry cannot be done on a manual retry after all scheduled retry attempts have completed.
On a partial retry the original cover sheet is never re-sent, because a partial retry cannot be considered unless at least the first page has already been sent successfully. Instead you may specify an alternate retry cover sheet using $retry_cover. System variables are available so that you can include details of how many pages have been sent and how many are still to come, as in the provided example.
When a partial fax transmission is to be sent, some fax boards directly support starting at a specific page in the TIF file. If not, CopiaFacts will build a temporary file omitting the pages already sent.
