42659 - DSP Option BD. 41500 - BERT. 11704 - ESF/SLC. 12041 - G. 821. TTC T-Berd 224. PCM Analyzer. T-BERD 224 Channel Access Tester is the comprehensive testing solution for troubleshooting and turn-up testing of VF, DDS, FT1, T1, DS3, STS-1 services, as well as ISDN, SS7, and TR-303 protocols.
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