MUX Mode Test Access HDSL4 for General Distribution Installation and Maintenance PracticeC-4 61223HDSL4L2-5CMUX EQ, Tx to Network, Rx from the NetworkThe Tx of the BERT is connected to the EQ TX jack, and the Rx of the BERT is connected to theRX EQ jack (Figure C-6). The Tx of the BERT is then substituted for the data that the H4TU-Csends to the Total Access Shelf’s MUX (network). The Rx of the BERT receives data directlyfrom the MUX (network). The MON TX and RX jacks are 432 ohm impedance copies of the EQjack TX and RX. This test is intrusive. Via the Test screen, ensure that the equipment jack isin the To Network mode. In the To Network mode, AIS (unframed all 1’s) is sent in the customerdirection.Figure C-6. MUX EQ, Tx to Network, Rx from NetworkMUX EQ, Tx to Customer, Rx from CustomerThe Tx of the BERT is connected to the EQ TX jack, and the Rx of the BERT is connected to theRX EQ jack (Figure C-7). The Tx of the BERT is then substituted for the data that the H4TU-Csends to the customer. The Rx of the BERT receives data directly from the customer. The MONTX and RX jacks are 432 ohm impedance copies of the EQ jack TX and RX. This test isintrusive. Via the Test screen, ensure that the equipment jack is in the To Customer mode. Inthe To Customer mode, AIS (unframed all 1’s) is sent in the network direction.Figure C-7. MUX EQ, Tx to Customer, Rx from CustomerTXDSXEQRXTXDSXMONRXTXRXT1 BERTFrom DSXTo DSXFrom CUSTTo CUSTFrom MUXTo MUX432 Ω432 ΩTXDSXEQRXTXDSXMONRXTXRXT1 BERTFrom DSXTo DSXFrom Selected CUSTTo Selected CUSTFrom MUXTo MUX432 Ω432 Ω
