Configuring the Clock Rate on a DCE Interface

Configuring the Clock Rate on a DCE Interface

fr_switch(config)#interace serial 1
fr_switch(config-if)#clock rate ?
       Speed (bits per second)
  1200
  2400
  4800
  9600
  19200
  38400
  56000
  64000
  72000
  125000
  148000
  250000
  500000
  800000
  1000000
  1300000
  2000000
  4000000

  <300-4000000>    Choose clockrate from list above

These cables can be ordered from Cisco Systemspart number CAB-V35MT for the V.35 male DTE cable and part number CAB-V35FC for the female DCE cable. When the cables are connected in a back-to-back mode, sometimes it can be difficult to tell which one is the DCE cable. The show controller command specifies the cable type and whether the cable is DCE or DTE. Example 2-2 shows the output of show controller, where you can tell what the interface type is. As you can see from the example, the interface serial 0 is a V.35 DTE cable. Use V.35 cables whenever possible because of their flexibility in a lab environment.