AudioCodes Mediant 3000 User Manual

User's Manual 228 Document #: LTRT-89730
Mediant 3000
b. Click Add; the following dialog box appears:
Figure 15-10: DSP Templates Table - Add Row Dialog Box
c. Configure a DSP Template according to the parameters described in the table
below.
d. Click Add, and then reset the device with a burn-to-flash for your settings to take
effect.
Table 15-6: DSP Templates Table Parameter Descriptions
Parameter Description
DSP Template Number
[DspTemplates_DspTe
mplateNumber]
Defines the DSP Template number.
DSP Resources
Percentage
[DspTemplates_DspRe
sourcesPercentage]
Defines the percentage of DSP resources allocated for the specified
template.
The default is 50%.
15.9 Configuring Media (SRTP) Security
The device supports Secured RTP (SRTP) according to RFC 3711. SRTP is used to
encrypt RTP and RTCP transport for protecting VoIP traffic. SRTP requires a cryptographic
key exchange mechanism to negotiate the keys. To negotiate the keys, the device
supports the Session Description Protocol Security Descriptions (SDES) protocol
(according to RFC 4568) . The key exchange is done by adding the 'a=crypto' attribute to
the SDP. This attribute is used (by both sides) to declare the various supported cipher
suites and to attach the encryption key. If negotiation of the encryption data is successful,
the call is established.
SRTP supports the following cipher suites (all other suites are ignored):

AES_CM_128_HMAC_SHA1_32

AES_CM_128_HMAC_SHA1_80

ARIA_CM_128_HMAC_SHA1_80

ARIA_CM_192_HMAC_SHA1_80
When the device is the offering side (SDP offer), it can generate a Master Key Identifier
(MKI). You can configure the MKI size globally (using the SRTPTxPacketMKISize
parameter) or per SIP entity (using the IP Profile parameter, IpProfile_MKISize). The length
of the MKI is limited to four bytes. If the remote side sends a longer MKI, the key is ignored.

AudioCodes Mediant 3000 Specifications

General

Brand	AudioCodes
Model	Mediant 3000
Category	Gateway
Language	English