Mitel 6867i Administrator's Manual page 247

5. Select a method to use from the "DTMF Method" list box. Valid values are RTP, SIP Info,
Both. Default is RTP.
Note: You can configure the DTMF Method on a global or per-line basis.
6. Select the type of RTP encryption to use from the "RTP Encryption" list box. Valid values
are SRTP Disabled, SRTP Preferred, or SRTP Only. Default is SRTP Disabled.
Note: You can configure RTP Encryption on a global or per-line basis.
7. In the Codec Preference List, select the desired codec you want the phones to use. Valid
values are:
• All
• Basic (G.711 u-law, G.711 a-law, G.729)
• G.722
• G.711u (8K)
• G.711u (16K)
• G.711a (8K)
• G.711a (16K)
• G.729
• G.726-16
• G.726-24
• G.726-32
• G.726-40
• L16 (8K)
• L16 (16K)
• AMR (Licensed feature)
• AMR-WB (G.722.2) (Licensed feature)
• G.722.1
Notes:
1. Setting Codec 1 to "All" ignores the packetization interval (ptime). The
packetization interval setting defaults to 30, which is the default for all codecs.
2. Setting Codec 1 to "All" automatically sets all other codec preference fields 2
through 10 to "None".
3. Setting Codec 1 to "Basic" and all other codec preferences in 2 through 10 to
"None", forces the phone to use only the basic codecs as in previous releases
(G.711 u-law, G.711 a-law, and G.729). If you select an additional codec to use
in the codec preferences 2 through 10 fields, those codecs are added to the list
of Basic codecs for the phone to use.
8. (Optional) In Codec 2 through Codec 10, select a preference of codecs to use on the phone.
Valid values are:
Global SIP Settings
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