DSP ,IOS or T1 hardware Interface?

[a.gooding]

guys,

this is the second time this has happend for the past year.

incoming calls go through fine. but when they attempt to make a pstn call, it busys out.

Details are as follows:

CCM VERSION 5.1.2

Router - 2851 - IOS version - 12.4(13a)

PSTN - T1-CAS

debugs show normal call clearing.

to rectify the issue, we reload the router and everything is fine again.

i followed the instructions to test DSP etc and everything seems fine. im leaning towards the IOS but not too sure.

where should i start with this investigation. again, im not too sure if i can recreate the issue, but the busy out is the same as if the actual port is not available.

[paolo bevilacqua]

Hi, can you please upgrade to 12.4(3j). The version you have has many bugs, really too many list.

Hope this helps, please rate post if it does!

[a.gooding]

did that this morning. im hoping its that and nothing else.

thanks for the reply.

BTW upgraded to 12.4 (18)LD. should i go with 3j still or should this be fine?

[paolo bevilacqua]

Hi, it is believed that(3j) is "better" because it has some feature less than (18), but had enjoyed a-b-c-d-e-f-g-h-i-j maintenance release, each one bringing only bug fixes.

[a.gooding]

got what youre saying.

thanks again, will go with your recommendations