Method and apparatus for G.706 frame alignment and CRC procedure test tool
US6128761A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1997 |
| Grant date | Oct 3, 2000 |
| Priority date | — |
| Expiry date | Dec 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/042
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
This invention describes a test tool based on a PC workstation. This test tool is used to validate any E1 framing telecommunication device. In order to comply with the CCITT G.706 recommendations, a device has to pass a series of test cases that are predetermined. Each test case contains test sequences according to the CCITT G.706 specifications. The purpose of this test tool is to generate a set of stimuli in the transmission mode, whereas in the reception mode, the value of the data returned by the tested device is analyzed and compared with the expected response. The data bytes are structured as for E1 multiframe format containing 16 frames of 32 timeslots, where each timeslot is a data byte. According to the G.706 recommendations, timeslot 0 is dedicated to the frame and multiframe alignment and to the CRC test. The test tool enables generating of the content of the 8-bit timeslot 0 of each frame and therefore modifying the frame alignment, the multiframe alignment and the CRC procedure test tool; and storing the content of the received 8-bit timeslot 0 to monitor the remote alarm indication bit (`A` bit) reflecting the behavior of the tested device so as to determine whether t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.