Hi all,

Good morning to everyone. I just configured a asterisk server to connect to
our huawei softswitch via SBC. server is working fine. But i have a small
problem. Wheich is i cant hear the far end crbt and announcement thru
asterisk.
Hear is my setup.

PhoneA ------> Asterisk -----> SBC-------> Huawei softswitch --------> PSTN
-------> PhoneB

all are sip connections. huawei softswitch to PSNT is ss7

When i observed the problem i found that RTP media not establish between to
asterisk to softswitch before call get answer. It only connect the RTP
stream when then call get answer. Untill phone call get answer asterisk send
a ringback to phone A. thats not the real ring back tone which is generate
from PSTN side.

Due to this case i cant hear any announcements or CRBT tone from asterisk
side.

How can i solve the problem ?

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There is always some one who know more Than us out there.

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SAM
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