
Configuration Note 4. Configuring AudioCodes E-SBC
Connecting Microsoft Lync 2013 to a SIP Trunk 49 June 2013
4.6 Step 6: Configuring IP Profiles
This step shows how to configure IP Profiles. In the example scenario, the IP Profiles are
used to configure the SRTP / TLS modes and other parameters that differ between the two
entities - Lync Server 2013 and SIP Trunk.
Note that the IP Profiles were assigned to the relevant IP Group in the previous step (see
Section 4.5 on page 47).
In the example, an IP Profile is added for each entity:
Microsoft Lync Server 2013 - to operate in secure mode using SRTP and TLS
SIP trunk - to operate in non-secure mode using RTP and UDP
To add IP Profiles:
1. Open the IP Profile Settings page (Configuration tab > VoIP > Coders and Profiles
> IP Profile Settings).
2. Add an IP Profile for Lync Server 2013:
a. Configure the parameters like this:
Parameter Example Setting
Profile ID
1
Media IP Version Preference
Only IPv4 / Only IPv6
Reset SRTP State Upon Re-key
Enable
Extension Coders Group ID
Coders Group 1
Media Security Behavior
SRTP
SBC Remote Early Media RTP
Delayed (mandatory because the Lync Server
2013 does not immediately send RTP to the
remote side if it sends a SIP 18x response)
RFC 2833 Behavior
Extend (in case the SIP Trunk does not send
RFC 2833 in SDP)
SBC Remote Update Support
Supported Only After Connect
SBC Remote Re-Invite Support
Supported Only With SDP
SBC Remote Refer Behavior
Handle Locally (mandatory because
2013 does not support receive Refer)
SBC Remote 3xx Behavior
Handle Locally (mandatory because
2013 does not support receive 3xx)
SBC Remote Hold Format
Inactive
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