Rtp-nte means you are sending the DMTF signaling inband with the rtp... add a low bandwidth codec i.e. G729 and then cRTP on top and your DTMF relay can become - sort of speak lost.. which is why you want to send the DTMF out of band..
hth From: ccie_voice-boun...@onlinestudylist.com [mailto:ccie_voice-boun...@onlinestudylist.com] On Behalf Of Art Sandborgh Sent: Thursday, May 21, 2009 1:12 PM To: ccie list Subject: [OSL | CCIE_Voice] V2 - cRTP breaks dtmf rtp-nte I don't know if this will be different in the V3 IOS, but I recently found that when I invoked cRTP on a link carrying SIP to CCM, DTMF stopped working. Apparently the NTE designation is carried in the RTP header and is not reconstituted correctly under cRTP when it is compressed/decompressed. I turned it on and off several times just to check that this was indeed the issue. Has anyone else encountered this? TIA, Art ________________________________ Hotmail(r) has a new way to see what's up with your friends. Check it out. <http://windowslive.com/Tutorial/Hotmail/WhatsNew?ocid=TXT_TAGLM_WL_HM_T utorial_WhatsNew1_052009>
