Error while trying to make a call btw 2 xlite phones

Did you make a esofties context in extensions.conf? It needs to look something like this:

exten => 200,1,Dial(SIP/200)
exten => 201,1,Dial(SIP/201)

What will you eventually be asterisk for? If it will be for a business, you are going to want to reconsider the names of your peers. The names of the peers should not be the same as the extension number you want to assign to them. It keeps potential intruders from guessing peers names.

thats d context am using,all the other phones are on the context as well,they can all call each other except the polycom phone,it can receive calls but cant make calls,any solution?