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XRT72L13 Datasheet(PDF) 209 Page - Exar Corporation |
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XRT72L13 Datasheet(HTML) 209 Page - Exar Corporation |
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209 / 370 page  áç áç áç áç XRT72L13 M13 MULTIPLEXER/CLEAR CHANNEL DS3 FRAMER IC PRELIMINARY REV. P1.0.6 197 “TxDS1/E1” signals will be over-written by this AIS pattern. Setting “Bit 5” to “0” configures the “Transmit” DS2 Channel 5 to carry normal traffic (as determined by the lower DS1 or E1 tributaries). 3.3.2.10 M23 Request Loopback Register Bits 6 thru 0 - DS2 Loopback Request Channel [6:0] These seven (7) “Read/Write” bit-field permits the us- er to request that the Remote Terminal Equipment configure one of their DS2 channels to operate in the “Remote Loopback” Mode. Setting any one of these bit-fields to “1” will cause the XRT72L13 M13 device to insert a “DS2 Remote Loopback Command Request” (for the corresponding DS2 channel) to be inserted into the “outbound” DS3 data stream. The “Remote Terminal Equipment” should respond by executing the appropriate loop- back command. For example, setting Bit 5 (within this register) will cause the XRT72L13 M13 device to insert the “Chan- nel 5 DS2 Remote Loopback Command Register” in- to the “outbound” DS3 data stream. The Remote Ter- minal Equipment will be expected to respond by con- figuring DS2 Channel 5, into the “Remote Loopback” Mode. NOTE: This registert is only active if the XRT72L13 M13 device has been configured to operate in the “M13/Chan- nelized” Mode. 3.3.2.11 M23 Loopback Activation Register Bits 6 thru 0 - DS2 Loopback Activation Channel [6:0] These seven (7) “Read/Write” bit-fields permit the us- er to configure any of the seven DS2 channels into the “Remote Loopback” Mode. Setting any one of these bit-fields to “1” will cause the corresponding DS2 channel to operate in the “Re- mote Loopback” Mode. Setting any one of these bit-fields to “0” will cause the corresponding DS2 channel to terminate “Remote Loopback Mode” operation. 3.3.2.12 M23 RxAIS Register M23 REQUEST LOOPBACK REGISTER (ADDRESS = 0X09) BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0 Not Used DS2 Loopback Request Channel 6 DS2 Loopback Request Channel 5 DS2 Loopback Request Channel 4 DS2 Loopback Request Channel 3 DS2 Loopback Request Channel 2 DS2 Loopback Request Channel 1 DS2 Loopback Request Channel 0 R/O R/W R/W R/W R/W R/W R/W R/W 0 0000 000 M23 LOOPBACK ACTIVATION REGISTER (ADDRESS = 0X0A) BIT 7BIT 6BIT 5BIT 4BIT 3BIT 2BIT 1BIT 0 Not Used DS2 Loopback Activation Channel 6 DS2 Loopback Activation Channel 5 DS2 Loopback Activation Channel 4 DS2 Loopback Activation Channel 3 DS2 Loopback Activation Channel 2 DS2 Loopback Activation Channel 1 DS2 Loopback Activation Channel 0 R/O R/W R/W R/W R/W R/W R/W R/W 0 0000 000 |
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