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Analyzing a Faulty Cisco IAD2431-16FXS

I have a Cisco IAD2431-16FXS that has an issue with audio from the FXS mouth ports, sending only static, receive is fine Testing with a 600ohm Alcatel TE200 with REN of 1 over a 1000m coil FXS Loopback Tests Lopping the local disables network and I get amplified...

NetCommWireless NDD-0300 Teardown

Main Board DSL Controller? D1_DSL W8396L01? D1_FAST Le87281 – G.Fast Single Channel Line Driver https://www.microsemi.com/product-directory/g-fast/4139-le87285 U11 UART? J2 Main Controller Catalyst semi? Microsemi? S8383N23SLMD8 Ethernet Transformer U7 –...

Cisco Voice

https://www.cisco.com/c/en/us/support/docs/voice/voice-quality/30141-symptoms.html#anc14 https://www.cisco.com/c/en/us/support/docs/voice/digital-cas/14007-net-signal-control.html DSP Debuging...

Adtran Netvanta 838

  Built a custom patch cable with two 50 pin champ connectors (set for pairs 1 thur 8) and krone disconnect modules in the middle which allows you to manually busyout/fault a line using a small slice of plastic It could be used to tap into and out of the line using...

Cisco Digital Modems Module

    Its all about Channelized E1….. And the Modem CSM MICA (Modem ISDN channel aggregation)   c3725 isdn switch-type primary-net5 ! controller E1 1/0 pri-group timeslots 1-31 ! interface Serial1/0:15 no ip address encapsulation hdlc isdn switch-type primary-net5...