The following information outlines The TSE Advantage:

Our 3 Point Testing Program

Testing on Actual Telephone Lines

Other firms that use line simulators may miss defects that are present, as simulators are more tolerant of failures. For example, the 'D' channel is not tested on simulators that provide simple dial tone. Only actual telephone lines will use both 'B' channels and the single 'D' channel used by ISDN. Real world telephone lines installed at TSE, both National and 5ESS provisioning, will show any defect if one is present. This type of testing is designed to emulate the exact conditions under which our equipment will be operating, insuring you of a trouble-free installation.

Testing of Rack-Mounted Units

TSE has the capability of real world testing our NT1 termination racks and power supplies in our state-of-the-art lab. We are able to mount and thoroughly test the following equipment:

• P series NT1 circuit packs
• B and U series NT1 termination devices
• Bulk power supplies and battery backup equipment

These testing procedures for rack-mount equipment also use the TSE 5ESS and National actual telephone lines to accurately simulate the real-world environment.

Dedicated Data Computers

For customers who require ISDN telephone sets with built-in data capabilities, TSE offers data equipped models. These are thoroughly tested in our lab using dedicated data computers. These computers send data streams from one data telephone out onto actual real-world 5ESS or National phone lines and then back again to our facility, where the data stream is analyzed for faults and verified accurate. This procedure, while lengthy and rarely performed in the industry, insures the high quality standards for which TSE is known.