What setting are required for making calls using  Audiocodes MP-108 FXS with Ser.

I am able to register the Audiocode device with Ser but Ser rejects all my call attempts.

If I put Username as ENDPOINT Number I am able to use that particular port for making calls but what about others?

Do I have to register aliases in SER for each port of audiocode?

Thanxs

Deepak Singhal