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Community Member

Channelized E1

Hello

I am using 3745 router with 2 port Channelized E1 module with RAD HTU E1 CSU for Channelized E1 connectivity. I am using Cisco PRI-E1 cable.

The problem is there is a indication of LOC ( it indicates the router CSU connectivity ) and it is showing that connectivity between router and CSU is not OK. I have changed E1 cables but nothing happening, I need to cross the Tx, Rx signals between router and CSU. Then it works.

Which cable is proper for this?

3 REPLIES
VIP Purple

Re: Channelized E1

Hello,

here are the Cisco part numbers, depending on what connector the CSU has):

CAB-E1-RJ45BNC

E1 Cable RJ-45 to Dual BNC (Unbalanced)

CAB-E1-RJ45TWIN

E1 Cable RJ-45 to Twinax (Balanced)

Check out the following link:

http://www.cisco.com/en/US/partner/products/hw/vcallcon/ps2152/prod_configuration_guide09186a008007dcd7.html#1003979

Before you change the cable though, try to toggle the crc4/no crc-4 on your E1 controller, there might be a problem with that:

Router#conf t

Router(config)#controller e1

Router(config-cont)#framing no-crc4

Router(config-cont)#shut

Router(config-cont)#no shut

or (depending on what you have configured originally):

Router#conf t

Router(config)#controller e1

Router(config-cont)#framing crc4

Router(config-cont)#shut

Router(config-cont)#no shut

You also might want to try to power down/power up your CSU.

Regards,

Georg

Community Member

Re: Channelized E1

I thik it not a cable related issuse if ur getting LOC on the modem that means that the the RAD htu E1 (G 703) is not getting the signal from the exchange end

Community Member

Re: Channelized E1

I am getting LOC on V35 not on G703.

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