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SIP Release Notes 158 Document #: LTRT-26901
CPE SIP Products
3.4 IP Media Constraints
This release includes the following known IP media constraints:
1. Playback to the IP side of LBR Voice Prompts:
• Sending DTMF signals present in the file as RFC 2833 is not supported during
playback, i.e., if the file/voice prompt contains digits, they are passed as voice and
not as RFC 2833.
• Generation of signals to the IP during playback is not possible.
• If the user wishes to pass DTMF signals present in the file over RFC 2833, or
generate in-band signals towards the network during playback, the user must
convert the LBR file into an HBR file (G.711 Alaw or G.711 uLaw).
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410
2. Voice Prompts files larger than 1 Mbyte cannot be permanently stored on flash
memory. Therefore, they are loaded directly to the RAM and must be loaded again
after the device is reset.
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410
3. When playing or recording an announcement when using a variable rate coder, the
configured MSCML offset must be set to zero.
Product
MP-11x MP-124
Mediant 600 Mediant 1000
Mediant 800 MSBG Mediant 1000 MSBG
Mediant 2000
Mediant 3000/TP-6310 Mediant 3000 HA/TP-6310
Mediant 3000/TP-8410 Mediant 3000 HA/TP-8410