Configuring Sip Settings - Tieline Merlin PLUS User Manual

21.14

Configuring SIP Settings

The codec is fully EBU N/ACIP Tech 3326 compliant when connecting using SIP (Session Initiation
Protocol) to other brands of IP codecs.
About SIP
SIP provides superior interoperability between different brands of codecs due to its standardized
protocols for connecting devices and is intended to be used when connecting Tieline codecs to non-
Tieline devices. Devices primarily use SIP to dial another device's SIP address and find its location
with a minimum of fuss. This task is usually performed by SIP servers, which communicate
between SIP-compliant devices to set up a call.
When connecting two devices, SDP performs similar tasks to Tieline's proprietary session data,
which is used to configure all non-SIP IP connections. There are two very distinct parts to a call
when dialing over IP. The initial stage is the call setup stage and this is what SIP is used for. The
second stage is when data transference occurs and this is left to the other protocols used by a
device (i.e. using UDP to send audio data).
All the mandatory EBU N/ACIP 3326 algorithms are supported (G.711, G.722, MPEG-1 Layer 2 and
16 bit PCM), as well as optional algorithms including LC- AAC, HE-AAC and aptX Enhanced. The
default algorithm selected when connecting using SIP is G.711.
Important Notes:
Each codec should be registered to a different SIP server account to avoid connection
conflicts.
SIP dialing is only supported over point-to-point connections, not multi-unicast
connections.
Tieline G3 codecs do not support connections using AAC and will default to MPEG
Layer 2 if an incoming call is programmed to use this algorithm.
SIP Server Connections: Getting Started
Registering codecs for SIP connectivity is simple. First, choose the SIP server that you wish to
register your codec with. On a LAN this may be your own server, or it could be one of the many
internet servers available. We recommend that you use your own SIP server and configure it to use
G.711, G.722, MP2 and AAC algorithms. This is because most internet SIP servers are for VoIP
phones and are only configured for G.711 and GSM algorithms.
When you register an account with a SIP server you will be provided with:
The SIP server IP address.
A username (often the same as a SIP number).
A password.
Domain details.
© Tieline Pty. Ltd. 2014
Merlin PLUS Manual v1.2 125