[SIPForum-discussion] 18x not received after 100 try

[Abhisek Acharya]

hey prashant,

absolutely you need to check with the terminating side.As B2B ua will only
route the call to the egress leg and will expect a provisional response
from the terminating side.If terminating side is not sending any 18x
response it is not B2B s fault.
In u r case the call is being cancelled by the calling party and
terminating is sending 487 for the INVITE transaction.
if u have more doubt pls send me the call trace of both the legs or u can
contact me in the below number

9823766406

abhisek



On Wed, Sep 5, 2012 at 9:42 PM, sri nivas <i.v.srinivas at gmail.com> wrote:

> Abhisek,
>
> in this scenario, we have B2BUA and termination carrier before it reaches
> the end user(UA).
>
> then as per the below notes, we need to check with our term end carrier
> and UA.
>
> thanks
>
> so 18x should be
>
>
> On Wed, Sep 5, 2012 at 10:25 AM, Abhisek Acharya <
> abhisek.acharya at gmail.com> wrote:
>
>> Hey Prashant,
>>
>> 18x message is always generated by the called party user agent.The 18x
>> response might be anything like 180,181,182,183,etc.If the called party
>> user agent does not generate the 18x response then its a definite problem
>> at the called party user agent.
>>
>> Things that you need to look after or check.
>>
>> 1.If the INVITE is reaching the destination user agent?
>> 2.If the INVITE is reaching to the called party destination then if the
>> phone originally rings or not.
>> 3.If the phone rings then there MUST be a 18x response coming from the
>> called party user agent.
>> 4.Also you need to see isnt the 18x getting lost in the transit by any
>> chance?
>>
>> Please lemme know if this helps or not.
>>
>> regards
>> abhisek
>> gslab
>>
>>
>>
>>
>> On Mon, Sep 3, 2012 at 7:16 AM, prashant tripathi <prashant.tpt at gmail.com
>> > wrote:
>>
>>> Dear Team,
>>>
>>> i am having a case where 18x message is not generated, customer switch
>>> is waiting for 20 seconds and then releasing the calls with 487. This
>>> problem is faced for all the destinations by customer, please let me know
>>> the possible solution for it and how to solve this problem,
>>>
>>> Regards,
>>> Prashant Tripathi
>>> 9960287303.
>>>
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