Dahdi on centos 7 with TE121

Hi All,
I just installed a new pbx on centos 7.
its asterisk 1.4(dont ask why i use this old version it must be that version) dahdi 2.11 with digium TE121 PRI card.
everything works fine but when i connect the PRI cable it dont show the cable is connected.
i.e:
localhost*CLI> dahdi show status
Description Alarms IRQ bpviol CRC4
Wildcard TE121 Card 0 RED 1 -1 -1

localhost*CLI> dahdi show channels
Chan Extension Context Language MOH Interpret
pseudo default default
1 from-pstn en default
2 from-pstn en default
3 from-pstn en default
4 from-pstn en default
5 from-pstn en default
6 from-pstn en default
7 from-pstn en default
8 from-pstn en default
9 from-pstn en default
10 from-pstn en default
11 from-pstn en default
12 from-pstn en default
13 from-pstn en default
14 from-pstn en default
15 from-pstn en default
17 from-pstn en default
18 from-pstn en default
19 from-pstn en default
20 from-pstn en default
21 from-pstn en default
22 from-pstn en default
23 from-pstn en default
24 from-pstn en default
25 from-pstn en default
26 from-pstn en default
27 from-pstn en default
28 from-pstn en default
29 from-pstn en default
30 from-pstn en default
31 from-pstn en default

any ideas??

Thanks,
Yosi

Red Alarm

Your T1/E1 port will go into red alarm when it cannot maintain synchronization with the remote switch. A red alarm typically indicates either a physical wiring problem, loss of connectivity, or a framing and/or line-coding mismatch with the remote switch. When your T1/E1 port loses sync, it will transmit a yellow alarm to the remote switch to indicate that it’s having a problem receiving signal from the remote switch.

The easy way to remember this is that the R in red stands for “right here” and “receive”… indicating that we’re having a problem right here receiving the signal from the remote switch.

http://docs.tzafrir.org.il/dahdi-linux/#_alarm_types

Hi Rmcgrath, thank for your reply.

I know what red alarm means, but it doesn’t looks like a cable or a remote switch problem because on other machines it works fine.
I tested it on tow different places where there are asterisk machines working.
It looks like a software issue I just don’t know how to handle because all the parameters looks fine.
now it has a loopback connector and the status remains red.

Yosi

Well otherwise; card is damage, or check OS system and version.

OS system I mean first; logs, services etc.