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GPRS ppp problem during connection ,IPCP does not started

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godspirit

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Here is the negotiation code during my test. the code imitated AN2120.

ATD*99***1#CONNECT

7E FF 7D 23 C0 21 7D 21 7D 25 7D 20 7D 29 7D 23 7D 25 C2 23 7D 25 81 85 7E

7E FF 7D 23 C0 21 7D 21 7D 27 7D 20 7D 28 7D 23 7D 24 C0 23 80 7D 3B 7E

7E FF 7D 23 C0 21 7D 22 7D 28 7D 20 7D 2A 7D 22 7D 26 FF FF FF FF 9F CE 7E

7E FF 7D 23 C0 23 7D 22 7D 29 7D 20 7D 25 7D 20 53 DE 7E

7E FF 7D 23 C0 21 7D 25 7D 27 7D 20 7D 24 E4 7D 31 7E

7E FF 7D 23 C0 21 7D 25 7D 27 7D 20 7D 24 E4 7D 31 7E
NO CARRIER


Send to mc35i

7E FF 7D 23 C0 21 7D 23 7D 25 7D 20 7D 29 7D 23 7D 25 C0 23 7D 25 C3 AB 7E

7E FF 7D 23 C0 21 7D 22 7D 27 7D 20 7D 28 7D 23 7D 24 C0 23 50 91 7E


7E FF 7D 23 C0 21 7D 21 7D 28 7D 20 7D 2A 7D 22 7D 26 FF FF FF FF F6 BA 7E

7E FF 7D 23 C0 23 7D 21 7D 29 7D 20 7D 36 7D 26 4D 79 4E 61 6D 65 7D 2A 4D 79 50 61 73 73 77 6F 72 64 6B 3C 7E


7E FF 7D 23 80 21 7D 21 7D 2A 7D 20 7D 2A 7D 23 7D 26 7D 20 7D 20 7D 20 7D 20 DE 81 7E

7E FF 7D 23 C0 21 7D 26 7D 27 7D 20 7D 24 29 34 7E

7E FF 7D 23 C0 21 7D 26 7D 27 7D 20 7D 24 29 34 7E


Does anyone have any idea about why ISP close the connection instead of send IPCP packet during negotiation ?
Thank you very much.
 

godspirit

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Re: GPRS ppp problem during connection ,IPCP does not starte

Could anyone with experiance help me solve this problem. Did PAP authentication has passed?
 

eeklac

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Re: GPRS ppp problem during connection ,IPCP does not starte

From your sequenece, it seems that it is ok:
- LCP (c021) is working fine
- PAP (c023) is working fine

however, when you are doing IPCP (8021), there server asking to terminate the connection:
- LCP (c021) termination (05)

But when you check your PAP,
7E FF 7D 23 C0 23 7D 21 7D 29 7D 20 7D 36 7D 26 4D 79 4E 61 6D 65 7D 2A 4D 79 50 61 73 73 77 6F 72 64 6B 3C 7E

you will find that there is an odd login name and odd login password:
- MyName (4D 79 4E 61 6D 65)
- MyPassword (4D 79 50 61 73 73 77 6F 72 64)

Which seems that it is invalid, such that the server terminated your connection.

My experience is that, the login name and password should be nothing for most the operator.

So, please remove the login string, and try again.

It will be apprecaited if you can send me the result, (eeklac@gmail.com), thanks.
 

anandmikkili

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Re: GPRS ppp problem during connection ,IPCP does not starte

I am unable to establish PPP over GSM/GPRS modems. If one modem RINGs the other then the other one able to receive the RING but not able to give reply to it by CONNECT
Scenario is like this:
Modem 1: atd<<9268706778;>>
Modem 2: RING RING RING
Modem 2: ata
Modem 2: ok
thats all when I run PPP the scenario is like this
Modem 1: . /etc/ppp/gprs-connect
Modem 2: nothing
Modem 1: script /usr/sbin/chat -v -f /etc/ppp/gsm-connect finished (pid=****), status=0*6
connect script failed
I hope my PPP connection is not established for sure before to that the modems are not agreeing to communicate with CONNECT statement exchanging between them.
Please suggestions needed urgently
Thanks and regards,
Anand Mikili
 

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