Hi Hemant,
Yes, you may create as many custom scenario files as needed.
In /opt/unimrcp/conf/umc-scenarios, create a scenario file, for example, bss2.xml by specifying the name, content-type and content-location as follows.
<?xml version="1.0" encoding="UTF-8"?>
<umcscenario name="bss2" class="Synthesizer" profile="uni2">
<resource-discovery enable="0"/>
<speak enable="1" content-type="application/ssml+xml" content-location="speak2.xml"/>
<termination enable="1">
<capabilities>
<codec name="LPCM" rates="8000 16000"/>
</capabilities>
</termination>
</umcscenario>
In /opt/unimrcp/data, create a text file speak2.xml which would hold your custom SSML content
Execute ./umc and type run bss2, where bss2 is an arbitrary name of the scenario specified above.