This read-write INTEGER controls the order in which the ANI (calling party number) and DNIS (called party number) are dialed out from this outgoing interface, either ANI-then-DNIS (the default) or DNIS-then-ANI. Some far-end equipment expects digits in a specific order to correctly parse calling versus called party information, so an admin adjusts this to match the receiving system's expectations. For example, if a connected PBX is misreading the called number as the caller ID, an admin might switch vismDsx1TxDigitOrder to dnisThenAni to match that PBX's expected digit sequence.