Hello Sukchan,

I found something stranger,

When the VLR try to Pagging the UE, the NextEPC-MME make the pagging correctly.

But when this UE is not reachable the NextEPC it not sending to VLR the SGsAP-UE-UNREACHABLE, like is necessary in the documentation:

I will try to fix it. 

In attached I'm sending a pcap from this case.

The IMSI unreachable in this case is 724210000000002.

Thanks

Romeu Medeiros

On Tue, Jul 16, 2019 at 7:45 PM Romeu Medeiros <medeiros@medeiros.eng.br> wrote:

Sukchan,

We can't thank you enough for the nextepc.

I think that in some situations the msc is losing the sgs registrations and can't forward the sms. But I will more tests before to disturb you there.

Thanks and success! 

Romeu Medeiros

Em ter, 16 de jul de 2019 às 19:35, Sukchan Lee <acetcom@gmail.com> escreveu:

Hi Romeu,

Wow! It’s amazing.

I can’t thank you enough for your effort.

Best Regards,

    Sukchan

2019년 7월 17일 (수) 오전 1:33, Romeu Medeiros <medeiros@medeiros.eng.br>님이 작성:

Hello guys and @Sukchan Lee 

I tested with sucess the send and receive SMS in new version of NextEPC running together with OSMO-MSC/HLR (SGS).

Thanks

Romeu Medeiros