Cisco 1720 losing connectivity

[scottrof]

We have two 1720's on a point to point t1 and all of a sudden they are periodically losing touch with eachother. We have the built in wic on both.

we have it logging to a local machine and here's what the log looks like:
Dec 10 16:28:38 host.domain.com 35217: 6d06h: Serial0: HDLC myseq 1068, mineseen 1068*, yourseen 1069, line up
Dec 10 16:28:48 host.domain.com 35218: 6d06h: Serial0: HDLC myseq 1069, mineseen 1069*, yourseen 1070, line up
Dec 10 16:28:58 host.domain.com 35219: 6d06h: Serial0: HDLC myseq 1070, mineseen 1070*, yourseen 1071, line up
Dec 10 16:29:08 host.domain.com 35220: 6d06h: Serial0: HDLC myseq 1071, mineseen 1071*, yourseen 1072, line up
Dec 10 16:29:18 host.domain.com 35221: 6d06h: Serial0: HDLC myseq 1072, mineseen 1072*, yourseen 1073, line up
Dec 10 16:29:33 XXX.XXX.XXX.XXX 35222: 6d06h: PowerQUICC(0/0): DCD is down.
Dec 10 16:29:41 XXX.XXX.XXX.XXX 35223:
Dec 10 16:29:49 XXX.XXX.XXX.XXX 35224: 6d06h: %LINK-3-UPDOWN: Interface Serial0, changed state to down
Dec 10 16:29:57 XXX.XXX.XXX.XXX 35225: 6d06h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down
Dec 10 16:30:06 XXX.XXX.XXX.XXX 35226: 6d06h: Serial0: attempting to restart
Dec 10 16:30:35 XXX.XXX.XXX.XXX 35227: 6d06h: Serial0: attempting to restart
Dec 10 16:30:50 XXX.XXX.XXX.XXX 35228: 6d06h: PowerQUICC(0/0): DCD is up.
Dec 10 16:30:58 XXX.XXX.XXX.XXX 35229:
Dec 10 16:31:06 XXX.XXX.XXX.XXX 35230: 6d06h: %LINK-3-UPDOWN: Interface Serial0, changed state to up
Dec 10 16:31:14 XXX.XXX.XXX.XXX 35231: 6d06h: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to up
Dec 10 16:31:14 host.domain.com 35232: 6d06h: Serial0: HDLC myseq 0, mineseen 0*, yourseen 1, line up
Dec 10 16:31:14 host.domain.com 35233: 6d06h: Serial0: HDLC myseq 1, mineseen 1*, yourseen 2, line up
Dec 10 16:31:14 host.domain.com 35234: 6d06h: Serial0: HDLC myseq 2, mineseen 2*, yourseen 3, line up
Dec 10 16:31:18 host.domain.com 35235: 6d06h: Serial0: HDLC myseq 3, mineseen 3*, yourseen 4, line up
Dec 10 16:31:28 host.domain.com 35236: 6d06h: Serial0: HDLC myseq 4, mineseen 4*, yourseen 5, line up
Dec 10 16:31:38 host.domain.com 35237: 6d06h: Serial0: HDLC myseq 5, mineseen 5*, yourseen 6, line up


Any thoughts?

 

[hexn]

The DCD is the Data Carrier Detect. Generally denotes a problem with either your CSU or with the telco.

I would call the telco and tell them you are losing your DCD on your interface. See what they say.