05-07-2008 03:29 AM - edited 03-15-2019 10:30 AM
Will a normal RJ45 from Cisco Gateway to Telco terminating device work for new PRI? Or is a RJ48 required?
thanks
05-07-2008 03:35 AM
Do not use ethernet cable. Please use only proper T1 cable, 100 Ohm impedence, with the correct pinout ans pair twisting, as per manual.
05-07-2008 04:19 AM
Hi Jerry,
Hope all is well :) Just wanted to add a note to the good info from my friend Paolo. This doc has some good references for the RJ48 Pinouts;
http://www.cisco.com/en/US/docs/routers/access/hardware/notes/marcabl.html#wp38057
Hope this helps!
Rob
05-07-2008 04:26 AM
We use RJ45 for our PRIs without any Problems. If you just need a short Cable to connect to your E1, RJ45 would be fine.
05-07-2008 05:19 AM
Sometimes the telco terminating box will only accept the keyed RJ48C but in most cases we use RJ45 straight through with no problems.
05-07-2008 05:55 AM
Rj48C twisting is different from ethernet, hence no protection from interference, and bigger radiated interfences.
All is good until strange eproblems happens, at that time you will replace the cable anyway, so why don't do things rights since the beginning.
05-08-2008 01:12 AM
Agreed, I'm all for doing things properly and if the telco kit does have the proper keyed socket you are safe.
Rich
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