Alerting with 'Transferred to is vital' ,Otherwise how is the recipient supposed to know who they are ;-)
Seriously I have a total dislike of blind transfers & consider them to be very rude not only to the recipient (who has no clue as to what the call is about) but also to the caller who now has to repeat everything they have just said If they actually get answered, or else they simply get bounced around as the call recalls to the front desk to someone else who does not have a clue as to the reason of the call.
- Rant over-
A Maintenance contract is essential, not a Luxury.
Do things on the cheap & it will cost you dear