Using a UC520, how would a person tag an outgoing call with the extension or handset ID (so that our telco can provide handset level billing of Long Distance).
UC520 - 16 user
10 channel PRI
Several people have DID's, the rest are for fax machines, main telephone tree, etc.
All locals send the main telephone number (telephone tree) as their Caller ID number to our telco. (Even the people with DID's send out the main telephone number as their caller ID). Our telco (Allstream) does not override what we pass.
Allstream is telling us just to set the account number. How would we do this?