[asterisk-users] DAHDI PRI error message

[Scott Stingel]

On 6/17/2010 6:47 AM, Gareth Blades wrote:
> Scott Stingel wrote:
>> On 6/17/2010 2:12 AM, Gareth Blades wrote:
>>> Scott Stingel wrote:
>>>> Hello-
>>>>
>>>> After configuring DAHDI and starting asterisk, I get the following 
>>>> message continuously on the Asterisk console:
>>>>
>>>>   WARNING[2057]: chan_dahdi.c:4158 pri_find_dchan: No D-channels 
>>>> available!  Using Primary channel 16 as D-channel anyway!
>>>>
>>>> My card is a D410P configured for E1, only the first span is 
>>>> configured, and configuration snippets are as follows:
>>>>
>>>>  From /etc/dahdi/system.conf:  (auto configured, first span only 
>>>> shown:)
>>>> # Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1"
>>>> span=1,1,0,ccs,hdb3,crc4
>>>> # termtype: te
>>>> bchan=1-15,17-31
>>>> dchan=16
>>>> echocanceller=mg2,1-15,17-31
>>>>
>>>> ----------------------------------------------------------------------
>>>>  From /etc/asterisk/dahdi-channels.conf (included in chan_dahdi.conf):
>>>> ; Span 1: TE4/0/1 "T4XXP (PCI) Card 0 Span 1"
>>>> group=0,11
>>>> context=from-pstn
>>>> switchtype = euroisdn
>>>> signalling = pri_cpe
>>>> channel => 1-15,17-31
>>>> context = default
>>>> group = 63
>>>> ----------------------------------------------------------------------
>>>>
>>>> QUESTION:  Shouldn't asterisk pick up from dahdi.conf that the 
>>>> signalling channel is 16?  Why the error message?
>>>>
>>>> Thanks
>>>> Scott
>>>>
>>>>
>>>>
>>>
>>> The error means that when it tried using the D channel 16 it was not 
>>> able to communicate. Probably a misconfiguration or you havent 
>>> plugged the cable in yet.
>>>
>>>
>>
>> Thanks Gareth-
>>
>> I'm zeroing in on the pattern of this channel allocation problem:  
>> This is in a system which has both a D410P and B200P (OpenVox).  When 
>> the D410P (wct4xxp driver) is configured by itself, there are no 
>> error messages and the PRI's work fine.  However, when I also load 
>> the wcb4xxp driver to support the B200P in the same system, I start 
>> getting these error messages and the PRI spans no longer work.
>>
>> I'm going to further quantify these symptoms and will report back
>>
>>
>
> Maybe a channel ordering problem?
>
> If you have a 4 port analogue card for example then if that card is 
> detected first you will find it is channels 1-4 and therefore your 
> ISDN30 will be channels 5-19,21-35 and the D channel being 20.
>
>
Yes, this was my thought too (wouldn't each BRI be 3 channels 2B+D 
though, so 6 channels for the B200P?), but despite much effort still 
unable to get it to work in configurations that have worked in the past 
with asterisk and bristuff.    Have tried the PRI first and them the BRI 
first.  Anyway, more experimentation is in order!