errors on pm3

Mike O'Connor (mike@wcoil.com)
Thu, 14 Aug 1997 18:17:23 -0400 (EDT)

Hello:
I have 3 pm3's all connected with channelized T1 lines. I have been
running several months with no problems (that I know of). Recently, I have
had a couple of customers complain of slow data transfers, even to our web
site. One customer sent me a traceroute from his 95 machine. This is what
displayed on his screen:

C:\>tracert www.wcoil.com

Tracing route to www.wcoil.com [206.230.70.4]
over a maximum of 30 hops:

1 * * * Request timed out.
2 217 ms 203 ms 201 ms gwwcoil.wcoil.com [206.230.70.1]
3 207 ms 211 ms 206 ms www.wcoil.com [206.230.70.4]

Trace complete.

Notice the time out on the connection between his modem and the pm3.
I then looked at the pm3 he is coming in on and noticed the following errors
when I did a sh line0

pm10> sh line0
---------------------- line0 - T1 Inband DS0 ---------------

Status: UP Framing: ESF Encoding: B8ZS PCM: u-law

Signaling: Trunk E&M wink start

Receive Level: -7.5dB to -15dB

Alarms Violations
----------------------------- -----------------------------
Blue 0 Bipolar 34149025
Yellow 2 CRC Errors 25
Receive Carrier Loss 8 Multiframe Sync 173006
Loss of Sync 3

pm10> ver
Livingston PortMaster PM-3 ComOS 3.5.1b8
System uptime is 91 days 1 hours 30 minutes

The number of Bipolar errors is obviously alarming. Where do I look for the
problem. The pm3? The T1 line? New ComOS? Any help would be greatly
appreciated.

Thank You

Mike O'Connor
West Central Ohio Internet Link
mike@wcoil.com