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The modem line(s) may not be used as a shared dial -up telephone line with a FAX machine, alarm system or other shared arrangement. The line must be bi-directional (have the ability to receive calls and dial out). The telephone lines should be ordered from the customer's local telephone provider (not their long distance company) or the customer's in-house communications group. TriTech makes these recommendations based on the experience of many installations in several parts of the country. To avoid problems with the VisiCAD installation, please follow the specifications as they are listed. The specifications for the telephone line are as follows: The line should be a data grade dial -up voice line able to support a 56Kbps modem communication. This is a standard dial -up voice line with data grade capabilities, not a dedicated four -wire data line. Many local telephone companies offer data grade voice lines for a nominal charge. As the quality of the dial -up voice lines varies around the country, we strongly recommend purchasing the data grade capabilities if they are offered in the customer's area. The telephone company should be informed that the connection is for a dial -up computer line, similar to a house telephone or FAX machine. The telephone line should terminate with a RJ-11 wall jack wired as a standard wall telephone. The RJ- 11 wall jack should be located closest to the computer server connected to the support modem. TriTech recommends no more than five feet. TriTech has found that some in-house telephone systems and/or PBXs do not reliably operate at the modem speeds needed to support VisiCAD. Because of this potential problem, the dial -up telephone line should not be routed through an in-house telephone system or PBX. If this telephone line is routed through an in-house switch or PBX it may interfere with file transfers. As all support telephone calls are provided on a dial -back basis (TriTech dials into the system and prior to hanging up, instructs VisiCAD to call TriTech), interference from an in-house telephone switch or PBX might increase file transfer time, which would increase the customer's long distance charges. Site Preparation and Support Connectivity Guide, V3.1 dated 8.12.2005 Page 7 of 13 TriTech Software Systems - Confidential & Proprietary