Which Serial cable i need to connect serial port of 2 Routers

[mahesh18]

Hi all,

I have 2 routers with Serial ports.

I need to connect them with serial cable.

Router 1  2650XM

When i do sh ver  it shows

1 serial interface

*************************************************************************************************************

Router 2   2620

when i do sh ver

4 Low-speed serial(sync/async) network interface(s).

Please let me know which type of serial cable should i buy?

Thanks

Mahesh

[Reza Sharifi]

Hi Mahesh,

Take a look at the serial interface, are they 60 pin interfaces? If yes, you need a DTC to DCE serial cable to connect your routers back to back

HTH

Reza

[mahesh18]

Hi Reza,

Thanks for reply

i side has 60 pins other end is like rj45  and it shows

WIC-1DSU-T1=

so both ends have different connections

which cable will i need now ?

Thanks

[Reza Sharifi]

Hi Mahesh,

The interface types have to be the same.   I have never seen a cable with one side serial 60 pins and the other side Rj45.

If you can get a WIC-1DSU-T1= (Rj45) for the other router, then you simply need to by a cross over T1 cable with Rj45 on both sides.

HTH

[mahesh18]

Hi Reza,

Thanks for reply .

If i get WIC-1DSU-T1= (Rj45) for another router then both interfaces will be serial and i can connect then with cross

over ethernet cable right?

Mahesh

[Reza Sharifi]

Mehesh,

It is called "cross over T1 cable" and not Ethernet.  The connector type is the same as Ethernet, but the pins are configured  different.  So you want to make sure you get cross over t1 cable.

Edit, you can make you own if you have the equipment but it is easier to buy one or 2

http://www.cisco.com/en/US/products/hw/routers/ps233/products_tech_note09186a00800a3f09.shtml

http://www.amazon.com/Diablo-Cable-Crossover-Individually-Shielded/dp/B005XPCWKI/ref=sr_1_9?ie=UTF8&qid=1320598655&sr=8-9

HTH

Reza

[mahesh18]

Hi Reza,

Thanks for reply again.

So in this case do i need to set clocking on 1 router  or both?

Or no need to set clocking at all?

MAhesh

[Reza Sharifi]

Mehesh,

You don't need clocking.  Just add these 2 commands to one site to make it DTE

service-module t1 clock source internal
service-module t1 timeslots 1-24 speed 64

HTH

[mahesh18]

Hi Reza,

Thanks for  reply.

so other side will be DCE  by default?

No config needed for other router?

Mahesh

[Reza Sharifi · Accepted solution]

Yes, try

service-module t1 clock source internal

on the DTE site and then add these commands to both side:

service-module t1 timeslots 1-24 speed 64

encapsulation hdlc

service-module t1 framing esf

service-module t1 linecode b8zs

HTH

[mahesh18]

Hi Reza,

Thanks for reply

I will try that in my LAB.

MAhesh