Thank you for your response.
I referred to the following topic:
And I was able to dial by adding “transport=ws” to the contact and escaping the semicolon!
For example, I specified the following in Dial:
PJSIP/XXXXXXXXXX/sip:geslrish@<ip>:61504\;transport=ws&PJSIP/XXXXXXXXXX/sip:sqi057u1@<ip>:61505\;transport=ws
This worked perfectly. Thank you for your help!