Caniatau ichi redeg rhaglen cyn cysylltu. Fe' i gelwir yn syth cyn cychwyn deialu. Gall hyn fod yn ddefnyddiol, e. e. i rwystro HylaFax rhag blocio' r modem.
Allows you to run a program before a connection is established. It is called immediately before dialing has begun. This might be useful, e. g. to stop HylaFAX blocking the modem.