ST2030s VoIP Business Phone
ST2030s SIP Administrator Guide v3.0
Page 127 of 308
Call-
hold “inactive” method
To enhance the compatibility with different softswitches, a new call-hold
method is introduced in this section.
Current implementation
Currently, ST20xx implements “
send-only
” method for holding a call,
carried in SDP session.
Content-Type: application/sdp
Content-Length: 221
v=0
o=2215 1325412 1325413 IN IP4 192.168.1.102
s=-
c=IN IP4 192.168.1.102
t=0 0
m=audio 41000 RTP/AVP 18 96
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=sendonly
Now, an alternative new call-
hold method “
inactive
” has implemented in
ST20xx to enhance the compatibility working on different softswitches.
Content-Type: application/sdp
Content-Length: 221
v=0
o=2215 1807412 1807413 IN IP4 192.168.1.102
s=-
c=IN IP4 192.168.1.102
t=0 0
m=audio 41000 RTP/AVP 18 96
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:96 telephone-event/8000
a=fmtp:96 0-15
a=inactive
Summary of Contents for ST 2030 SIP
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