Klaus Darilion wrote: > Xavier Cardil schrieb: > >> Hi, I've managed to get HYLAFAX---->T38MODEM-----> >> ASTERISK---->CISCOAS5400 working, but when they are negotiating asterisk >> drops a message telling "Unknown RTP codec 96 received from gateway" Do >> somebody know how to fix it ? >> >> Thank you ! >> >> >> >> << [ TYPE: Control (4) SUBCLASS: Ringing (3) ] [SIP/GWCISCO5400O-600bfcc8] >> << [ TYPE: Control (4) SUBCLASS: Answer (4) ] [SIP/GWCISCO5400O-600bfcc8] >> << [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [SIP/GWCISCO5400O-600bfcc8] >> << [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [SIP/GWCISCO5400O-600bfcc8] >> << [ TYPE: Control (4) SUBCLASS: T38/Negotiation Requested (19) ] >> [SIP/GWCISCO5400O-600bfcc8] >> << [ TYPE: Null Frame (5) SUBCLASS: N/A (0) ] [SIP/GWCISCO5400O-600bfcc8] >> [Jul 16 17:50:39] NOTICE[2736]: rtp.c:1739 ast_rtp_read: Unknown RTP >> codec 96 received from '192.168.3.163' >> > > Is '192.168.3.163' the Cisco GW? If yes, then it is probably an NSE > packet. NSE is a Cisco proprietary FaxoverIP solution and uses per > default payload types 96 and 97 to signal a changeover from VoIP to FoIP. > > Probably you have to configure the Cisco GW to use T.38 instead of NSE > for FoIP. > When did RFC2833 become a proprietary Cisco spec?
The NSEs just signal the startup of FAX. You still need to switch into T.38 to actually exchange the FAX. Steve _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
