APPENDIX C. ISDN OPTION TYPE 40
2. OPERATION
Dialing and Storing Telephone Numbers
Introduction
After installing the ISDN Option Type 40, you must be careful to select the correct signaling type (Group 3 or Group 4) when dialing, or when storing a telephone number as a Speed Dial or Quick Dial.
The G4/G3 Selector key on the operation panel allows you to select whether the telephone number is to be dialed using Group 3 (G3) or Group 4 (G4). An indica - tor above the key will light to show which has been selected.
To change the setting, press the key until the required indicator is lit. In most cases, <G3> (Group 3) or <G4> (Group 4) will appear on the display as a refer - ence while you are entering a telephone number.
CAUTION: When you dial a number using a Quick Dial or Speed Dial, or using AI Redial, check the two indicator lamps above the G4/G3 selector key to make sure that the correct mode is selected. If it is not correct, press the G4/G3 selector key until the correct indicator is lit.
Notes: ❐ Your machine is set up to send to Group 3 fax machines over the regu - lar telephone network (the PSTN, the Public Switched Telephone Net - work). If you wish to send to Group 3 machines over the ISDN, contact your service representative.
❐When dialing a fax machine or telephone over an ISDN, the destination may have a subaddress number. This number can be thought of as similar to an extension number on a PBX. If the destination telephone or fax machine has a subaddress number, input this number when dial - ing. You can get this number from your contact at that location.
