On 02.04.11 04:39, renw wrote: > Hi, > thank you very much。 > I am doing softswitch about core network. The incoming is bicc, and > its media type is voice call without ptime value in SDP，so I response > ptime=20ms in APM，at last peer release me because of no iuup ack msg。
in fact, handling the iuup-handshake should be done at the BICC/SIP gateway. -Raphael. > 2011-04-02 > ------------------------------------------------------------------------ > ------------------ > 任文 > 艾 诺通信系统（苏州）有限责任公司 > 苏州工业园区苏虹西路81号 苏虹工业坊A8单元 > Tel:13402581472 > ------------------------------------------------------------------------ > *发件人：* Vladimir Broz > *发送时间：* 2011-04-02 06:53:05 > *收件人：* renw > *抄送：* semsdev > *主题：* Re: [Semsdev] the default ptime of g711(pcmu/pcma) > Hi, > I would say that 20ms is used as default. > If you need any spec., please check e.g. RFC3551 - RTP A/V Profile, > Table 1 in Section 4.5 Audio Encodings. > 4.5 Audio Encodings > name of sampling default > encoding sample/frame bits/sample rate ms/frame ms/packet > __________________________________________________________________ > DVI4 sample 4 var. 20 > G722 sample 8 16,000 20 > G723 frame N/A 8,000 30 30 > G726-40 sample 5 8,000 20 > G726-32 sample 4 8,000 20 > G726-24 sample 3 8,000 20 > G726-16 sample 2 8,000 20 > G728 frame N/A 8,000 2.5 20 > G729 frame N/A 8,000 10 20 > G729D frame N/A 8,000 10 20 > G729E frame N/A 8,000 10 20 > GSM frame N/A 8,000 20 20 > GSM-EFR frame N/A 8,000 20 20 > L8 sample 8 var. 20 > L16 sample 16 var. 20 > LPC frame N/A 8,000 20 20 > MPA frame N/A var. var. > PCMA sample 8 var. 20 > PCMU sample 8 var. 20 > QCELP frame N/A 8,000 20 20 > VDVI sample var. var. 20 > Hope that helps, > -Vladimir B. > On 04/01/2011 05:17 PM, renw wrote: > > Hi,all > > this is SOS > > what's the default ptime of g711 64kbps a-law? > > which doc mentioned this? > > B&R > > 2011-04-01 > > ------------------------------------------------------------------------ > > ------------------ > > 任文 > > 艾诺通信系统（苏州）有限责任公司 > > 苏州工业园区苏虹西路81号苏虹工业坊A8单元 > > Tel:13402581472 > > > > > > > > _______________________________________________ > > Semsdev mailing list > > [email protected] > > http://lists.iptel.org/mailman/listinfo/semsdev > > > _______________________________________________ > Semsdev mailing list > [email protected] > http://lists.iptel.org/mailman/listinfo/semsdev
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