Voicemail Surfing: Circumventing Gatekeepers Using Documented Voicemail System Features.

This is some very good iformation and also enlightening. I will share this information with the staff in my office. 

Very true Dwight,anyone connected with the recruiting business, whether they are corporate recruiters, contingency recruiters, agencies, or even name sourcers, knows the value of speaking with an individual directly. Despite this fact, there are often multiple barriers to contacting the person you (or your client) needs to
speak to. Gatekeepers will often ask your name, company, and reason for calling. Also, you may have to call the same competitors time and again to find people for your company, and the receptionist will inevitably begin to recognize your voice. The issue may even be time related. If the person you are trying to contact is rarely at their desk, you will probably not want to go through their receptionist or automatic system every time you call.
Voicemail Surfing is achieved through three major means: 1) It can be used to discover extensions for certain individuals. These can often be turned into phone numbers that can be used to dial them directly; 
2) It can also be used to go from one phone extension to another without hanging up the
phone or going through a gatekeeper. 
3) It can be used to open up the most stubborn voicemail systems by finding automated attendant numbers that receptionists normally do not answer.

Thank you for sharing the document with us....Then receptionist, gatekeepers will be of no use :)