06-15-2009 03:45 AM - edited 03-04-2019 05:07 AM
Hello everyone,
i'm trying for a couple of days now to fix the connection issues but no luck till now. I hope one of you can give me a hint. I'll appreciate it very much.
So here is the setup:
one cisco 1841 with VWIC2-1MFT-T1/E1 (master)
one cisco 1841 with WIC/HWIC 0 Bri Interface (slave)
The primary Link is a DSL/VPN connection which is OK.
Now the plan is to have a backup if the primary DSL Link goes down. The problem is the ISDN connection doesn't even come up.
When i try to call the "master" i get this error message:
Cause i = 0x80A2 - No circuit/channel available
Please see int the attachement the config of "master" and the complete debug trace.
The question is why i'm getting the error "No circuit/channel available" all the time.
Didn't i configured the E1 interface right?
Thank you.
Solved! Go to Solution.
06-15-2009 06:31 AM
The above datasheet mentions only ISDN BRI, not PRI.
06-15-2009 04:03 AM
Does the call hit the 1841 at all ?
06-15-2009 04:22 AM
Hi,
well, to be honest i don't know. On the "master" i don't have any isdn dsbug options i can use, thus i can't say i the call comes in.
What i did to check this: i've connected the E1 cable to an Lucent Max4000 Router. Here i have the possibility to see if a call comes in in realtime. So i could see the number of the calling router (slave). This means that the E1 can be called.
Here is the output of sh controllers:
sh controllers e1
E1 0/0/0 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Version info Firmware: 20060707, FPGA: 13, spm_count = 0
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
CRC Threshold is 320. Reported from firmware is 320.
Data in current interval (764 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Total Data (last 24 hours)
0 Line Code Violations, 0 Path Code Violations,
0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins,
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
Thx for your reply
06-15-2009 04:29 AM
I see, sorry I had not noticed that before, on the 1841 you need to configure pri-group for isdn, not channel-group.
Since I think it will not let you configure ISDN you need a 2811 with HWIC-1CE1T1-PRI. The VWIC that you have is manly for voice.
06-15-2009 04:45 AM
Hmm...i tried the pri-group command which fails:
%Please configure network-clock-participate wic 0 first
%Insufficient resources to create pri-group - it has been removed
The command network-clock-participate doesn't show up in the CLI.
So im kind o confused now because here: http://www.cisco.com/en/US/products/hw/modules/ps2617/products_configuration_example09186a008052c920.shtml i can see that this interface supports data too.
06-15-2009 04:48 AM
Data yes, but not PRI data. These are very different things for Cisco.
I'm 99.9% positive that you cannot have ISDN PRI on the 1841.
06-15-2009 06:00 AM
We use that VWIC in our routers to support data PRI. Here's a URL on how to configure PRI. You have a few things to fix up. The pri-group instead of the channel-group. I think you also need to configure the D-channel. Check to see if you need PPP encapsulation, etc., as well as configuration under the controller.
http://www.cisco.com/en/US/docs/ios/12_2/dial/configuration/guide/dafchant.html
06-15-2009 06:16 AM
Hi slamsfield,
i'm afraid i cannot configure pri-group on that interface. See above.
06-15-2009 06:12 AM
OK, this is bad, we just bought four 1841 and VWIC2-1MFT-T1/E1 interfaces.
Is there any way to use the E1 interface on a 1841?
06-15-2009 06:16 AM
Sorry, as mentioned above, no ISDN PRI is possible with a 1841.
You've always to verify cisco purchases with a professional, because mistakes are expensive.
06-15-2009 06:38 AM
You're absolutely right, but when a cisco representative recommends you this combination of hardware what can you do?
Ok, lets see if we can return this hadrware.
Thank you very much for your replies.
06-15-2009 06:26 AM
I believe it does support PRI using that VWIC, but, according to the data sheet, only data, no voice.
https://www.cisco.com/en/US/prod/collateral/routers/ps5853/product_data_sheet0900aecd8016a59b.html
06-15-2009 06:31 AM
The above datasheet mentions only ISDN BRI, not PRI.
06-15-2009 07:47 AM
Sorry guys, but Cisco could be a lot clearer on what is or isn't supported in the PRI offerings.
Table 1 on this URL indicates that there is no PRI support from the MFT-T1 on the 1700, 2600, 3600, 3700, 1841, 2800, and 3800. Most of these models support PRI with this module. Here is a URL for configuring the 1700.
http://www.cisco.com/en/US/docs/routers/access/1700/software/feature/guide/t1e11700.html#wp69360
The same table also indicates that voice is supported on the 1841. This contradicts the data sheet that said the MFT-T1 supports data only, no voice. This same table also says the HWIC-1CE1T1-PRI is supported on the 1841. This contradicts what is in Table 3 below.
https://www.cisco.com/en/US/prod/collateral/modules/ps2797/product_data_sheet0900aecd80710c88.html
06-15-2009 08:00 AM
Cisco could be clearer on a lot of things, that's for sure.
However I do not see any reference to the 1841 anywhere in the first document that you linked, so not sure where the contradiction is.
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