Installation & Maintenance Manual 15. Configuring the SIP Transport Type
Version 6.8 151 Microsoft Lync Server
15 Configuring the SIP Transport Type
The following SIP transport types can be employed for communication between the PSTN
Gateway and the Mediation Server:
Transport Layer Security (TLS) – enabled by default (and recommended) - see
Section
15.1 on page 151.
Transmission Control Protocol (TCP) – see Section 15.2 on page 161.
15.1 Configuring TLS
TLS provides encrypted SIP signaling between the PSTN Gateway and the Mediation
Server. When using TLS, you also need to configure the PSTN Gateway with a certificate
for authentication during the TLS handshake with the Mediation Server.
15.1.1 Step 1: Enable TLS and Define TLS Port
The procedure below describes how to enable TLS and configure the PSTN Gateway ports
used for TLS.
To enable TLS and configure TLS ports:
1. Open the SIP General Parameters page (Configuration tab > VoIP menu > SIP
Definitions > General Parameters).
Figure 15-1: SIP General Parameters Page
2. From the ‘SIP Transport Type’ drop-down list, select TLS.
3. In the ‘SIP TLS Local Port’, enter 5067. This port corresponds to the Mediation Server
TLS transmitting port configuration.
4. In the ‘SIP Destination Port’, enter 5067. This port corresponds to the Mediation
Server TLS listening port configuration.
5. Click Submit to apply your settings.
6. On the toolbar, click Burn to save the changes to the PSTN gateway flash memory.
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