Subject: Question about Protocol Version Negaotiation

From: Qiu Xiuping <[email-masked]>
Date: Sat, 22 Jan 2000 22:50:30 +0800

Hi, All.

In 11.3 Negotiation of Protocol Version

1. The first ServiceChange command from MG contains a version number .
2. MGC supports only a lower version, then the MGC sends a ServiceChangeReply with the lower version . 3. If the MG is unable to comply, it will reject the association, with Error 406 Version Not Supported.

I wonder what command will MG use in step 3 .
Will it be notify? but there is no EventDescriptor.
And is it a TransactionRequest , but it is with Error code.
IMO, error code is together with TransactionReply but not TransactionRequest ?

And another question, I remember it says that MEGACO/H.248 will be compatible backwards somewhere.
Then  if both MG and MGC use the lower version, why there  still exists complying problem.

Regards,
Xiuping Qiu
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Xiuping Qiu
Huawei Technologies Co., Ltd.
Mail to   [email-masked]
Visit     http://www.huawei.com.cn
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