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1.8.0-rc2_crypto_offer.diff 2010-10-19 716 Bytes 66 weekly downloads
1.8.0-rc2_asterisk_amr_patch.diff 2010-10-19 30.4 kB 66 weekly downloads
README 2010-10-15 1.3 kB 11 weekly downloads
This patch has been created with purpose to evaluate AMR-NB codec with asterisk 1.8.0 RC2. The patch also force the SDP to offer octet-aligned mode to 1. To download the AMR-NB codec from 3GPP site follow this link : http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-700.zip Installation Go to asterisk source-code amr codec folder (cd asterisk-1.8.0-rc2/codecs/amr/) then : wget http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-700.zip1 unzip -j 26104-700.zip unzip -j 26104-700_ANSI_C_source_code.zip go back to asterisk-1.8.0-rc2/ folder and re-compile Asterisk (make;make install) Considering to use mobile client over GPRS network a way to save bandwidth can be to use Crypto Offer of RTP HMAC_SHA1_32 packet instead of HMAC_SHA1_80, This will 120 bytes/m. --- original/asterisk-1.8.0-rc2/channels/sip/sdp_crypto.c 2010-06-08 07:29:08.000000000 +0200 +++ tmp/asterisk-1.8.0-rc2/channels/sip/sdp_crypto.c 2010-10-15 21:10:50.000000000 +0200 @@ -287,7 +287,7 @@ int sdp_crypto_process(struct sdp_crypto int sdp_crypto_offer(struct sdp_crypto *p) { char crypto_buf[128]; - const char *crypto_suite = "AES_CM_128_HMAC_SHA1_80"; /* Crypto offer */ + const char *crypto_suite = "AES_CM_128_HMAC_SHA1_32"; /* Crypto offer */ if (p->a_crypto) { ast_free(p->a_crypto);
Source: README, updated 2010-10-15

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