The Trend Aurora Sonata is an ISDN Tester. It is capable of Displaying G.703/G.704 statistics and FAS/NFAS word. It can handle 3.1KHz and ISDN voice calls on user selected B-Channel. The unit can record, Bits received, Bit Errors, Bit error ratio,  Errored seconds, Error Free seconds, Severely Errored Seconds, Unavailable Seconds, Degraded Minutes, and elapsed time.
• Handheld ISDN Tester
• Battery Operated
• Wide range of Teleservices. Auto/Manual Bit Error inject. Loop of Receive to Transmit data.

• Trend Aurora Sonata ISDN Tester with Basic & Primary Rate Interfaces - Datasheet (420 KB)