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25-PIN CONNECTOR (FEMALE)
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15
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24
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20
24
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15
17
Frame Ground
Transmit Data
Receive Data
Request To Send
Clear To Send
Signal Ground
Data Set Ready
Carrier Detect
Transmit Clock
Receive Clock
Data Terminal Ready
Internal Clock
25-PIN CONNECTOR (FEMALE)
Frame Ground (AA)
Receive Data (BB)
Transmit Data (BA)
Clear To Send (CB)
Request To Send (CA)
Signal Ground (AB)
Data Terminal Ready (CD)
Internal Clock
Data Set Ready
Carroer Detect
Transmit Clock
Receive Clcok
“DCE”“DTE”
Back to Back Mux Cable
1 2 3 4 5 6 7 8
RT
RR
RT
RR
{
{
Receive
Transmit
RJ48 Cabling for Internal DSU
* 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.