Arrangements for supervision, monitoring or testing

Full Title

Automatic or semi-automatic exchanges > Arrangements for supervision, monitoring or testing

Child Classifications

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• H04M 3/2209
• H04M 3/2218
• H04M 3/2227
• H04M 3/2236
• H04M 3/2245
• H04M 3/2254
• H04M 3/2272
• H04M 3/2281
• H04M 3/229
• H04M 3/24 with provision for checking the normal operation
• H04M 3/26 with means for applying test signals
• H04M 3/36 Statistical metering, e.g. recording occasions when traffic exceeds capacity of trunks