[SIPForum-discussion] The usage of 181 in SIP-I and SIP-T

[alexzhang at gdnt.com.cn]

Hi,
 
During the SIP-I -> ISDN call, if the call forwarding occurs in the UA,
which SIP message will be used to encapsulate the ISUP event code[call
forwarding]. We understand that for SIP-T, per RFC3398, it is described
that the 181 will carry the ISUP CPG[event indicator = call forward],
but how about the SIP-I? The Q.1912 only mention that the call
forwarding is supported via ISUP encapsulation, however, which 18x
message will be used?
 
Best Regards,
Alex Zhang
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alexzhang at gdnt.com.cn <mailto:alexzhang at gdnt.com.cn> 
 
 
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