1. Field of the Invention
The present invention relates to an electronic apparatus provided with facsimile transmission means for facsimile transmission of two-side image data, and a control method and a control program therefor.
2. Related Background Art
The conventional facsimile apparatus is basically designed on an operation of transmitting an original bearing information on one side thereof and recording such information on one side of a sheet. Also the conventional ITU-T Recommendation T4 or T30 describes such one-side communication only.
On the other hand, with recently increasing attention toward resource saving, so-called two-side recording mode for recording on both a front side and a reverse side of the recording sheet is increasingly provided in a printer, a copying machine, etc. Also the standard for the two-side facsimile communication was recommended by the ITU-T in February 2000. This is the ITU-T Recommendation T.30 which defines informing the presence or absence of a receiving function for the two-side information from a receiver to a transmitter and informing whether the communication is in the two-side mode from the transmitter to the receiver.
Also for transmitting the two-side image information, there are known two-side alternate transmission (alternate mode) of transmitting an image on the front side of an original and that on the reverse side alternately for each page, and two-side continuous transmission (continuous mode) of transmitting all the images on the front sides of the originals and then transmitting all the images on the reverse sides.
On the other hand, in a facsimile apparatus executing the conventional one-side communication, there is known an apparatus capable of so-called collective transmission.
In such collective transmission, in case plural image data to be transmitted to a same address are present in a transmission image memory on account of various reasons, for example, the postponement of the transmission owing to the destination being busy at the timer transmission or at the previous calling, the image data to the same address are collectively transmitted in one call connection.
Such collective transmission is effective in reducing the communication charge and is therefore preferably utilizable also in the facsimile apparatus capable of two-side communication, but such collective communication is not considered in the present Recommendation for two-side communication.
For example, since the aforementioned Recommendation T.30 assumes that all the original images to be transmitted in one two-side communication are two-side images, a machine constituted simply based on such Recommendation cannot achieve the collective communication in case a one-side original and a two-side original are mixedly present for the same address. On the other hand, a configuration simply designed to execute collective communication by an independent procedure may hinder interchangeability with a facsimile apparatus made by another manufacturer.