>I am trying to move a Portmaster3 to a ISDN-30 PRI provided by Worldcom.
>It used to be connected to an ISDN-30 provided by the incumbent Dutch
>telco. The Worldcom techs say that the line is provisioned according to
>the same specs (CRC4 framing, HDB3 encoding). And, the line actually
>works. What worries me is the number of CRC4 and E-bit errors, and
>especially the rate at which they increase:
[snip]
>Ideas, anyone?
We had exactly the same problems - except the line wouldn't even stay up
for more than a few minutes.
We are connected to an Alcatel 10B switch and it was _supposed_ to be set
up for Euro-ISDN. Except they set the framing to fas instead of CRC4.
The ISDN debugging is very helpful in sorting this out. What I ended up
doing was comparing the handshaking data coming down the line with the data
in the Tech Note http://www.livingston.com/tech/docs/trb/isdn.fm.html
When I saw that I was getting data that didn't match tech note I changed
the framing to fas and it worked fine. I informed the local engineer who
checked again and sure enough the switch was set incorrectly. Welcome to
the West of Ireland :-)
Moral - don't trust that your E1 is setup correctly.
Stephan
---------------------------------------------------------
Stephan Wik ANU Internet Services
Webmaster http://www.anu.net
Mac Web Hosting Specialists Westport,Ireland
-
To unsubscribe, email 'majordomo@livingston.com' with
'unsubscribe portmaster-users' in the body of the message.
Searchable list archive: <URL:http://www.livingston.com/Tech/archive/>