RJ48 Cabling for Internal DSU
Receive
Transmit
{
{
RT
RR
RT
RR
1 2 3 4 5 6 7 8
Back to Back Mux Cable
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Frame Ground |
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| Frame Ground (AA) |
1 |
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Transmit Data | 2 |
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| 3 | Receive Data (BB) |
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Receive Data | 3 |
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| 2 | Transmit Data (BA) |
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Request To Send | 4 |
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| 5 | Clear To Send (CB) |
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Clear To Send | 5 |
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| 4 | Request To Send (CA) |
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Signal Ground | 7 |
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| 7 | Signal Ground (AB) |
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Data Set Ready | 6 |
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| 20 | Data Terminal Ready (CD) |
Carrier Detect | 8 |
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Transmit Clock | 15 |
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| 24 | Internal Clock |
Receive Clock | 17 |
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Data Terminal Ready | 20 |
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| 6 | Data Set Ready |
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Internal Clock |
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| 8 | Carroer Detect |
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24 |
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| 15 | Transmit Clock | |
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| 17 | Receive Clcok |
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| “DCE” |
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| “DTE” |
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*This cable is used to connect two muxes back to back. The cable is asymmetrical and allows one of the mux's to provide clock to the TxC and RxC pins of the other mux. Make sure the configuration of the composite links include one of them as having an internal clock and the other mux an external clock.
