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。
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
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