Cisco Switching/Routing :: Connecting 2650XM - 2620 Router Back To Back WIC - T1?

Nov 25, 2011

I have 2650XM  router and 2620 Router Both routers have built in WIC  T1 CSU/DSU cards
 
2620Router --
 
2620Router#sh int se0/0
Serial0/0 is down, line protocol is down
  Hardware is PQUICC with Fractional T1 CSU/DSU
  Description: DTE  side
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation HDLC, loopback not set

[code]....
 
My question is that cisco website says there are two type of cable connections for this type of config --which are  --T1 CSU/DSU ConfigurationSet one CSU/DSU to clock source internal, and the other CSU/DSU to clock source line. The linecode, framing, data-coding, and timeslots must be set the same on both CSU/DSUs.Four-Wire 56k CSU/DSU Configuration For my network connection which type of config i should use??Secondly i try to connect these ports by normal crossover cable  it did not work.So for this type of connection i know i need T1 cross over cable--  which has RJ 48 connections at both sides.I check cable from ebay which is RJ45 RJ48 cross over  --  will this cable work in my router to router connection.

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[Code].....

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[code]...
 
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[ code]..... 
 
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