Black Box EntraGuard Gold Telephone Entry/Intercom System - Manual (Page 3)

3 of 3 12/14/2007
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Telephone entry and intercom systems.
Technically Speaking
The need to provide secure access to a business or
community has never been greater. What should you look
for in an entry and intercom system? What does your system
need to accomplish? There are some basic choices that all
system owners should consider.
A visitor should be able to call an employee’s or a
resident’s telephone. The system may have a handset or
it may work with a speakerphone. Maybe there is direct
access to the phone number via an easy-to-access directory.
Or a keypad may be used to gain access through a locked
gate or door.
The employee or resident should be able to grant access
to the visitor by touching a key on his or her telephone. Most
systems should have some form of event memory, which logs
who gains access and who permits it. Most systems should
enable you to connect via modem or LAN to the overall access
control network.
The telephone entry controller may be designed to
communicate over an ordinary, voice-grade telephone line
or a dedicated cabling system.
And finally, some systems might need to offer features
for the Postal Service or for persons with disabilities.
Identifying visitors by voice.
With a telephone entry and intercom system, the most
common way residents or employees can identify a visitor is
when the visitor speaks into the call box’s speakerphone or
telephone handset. However, a visitor with ill intent might
be able to trick the employee or resident into letting him or
her in, for example, by misrepresenting who he or she is. In
addition, the noise level near the call box might make
conversation difficult. For basic ID purposes, a speakerphone
is fine. But there is a better measure for added security:
closed-circuit TV (CCTV).
Identifying visitors by voice and CCTV.
If you want to verify your visitor’s identity without leaving
the security of your office or home, opt for a telephone entry
and intercom system with CCTV capability.
This security method features a CCTV camera at the call
box. When your business or residence receives a phone call
from a visitor at the gate, you can also get a visual on a
nearby CCTV monitor or turn your TV set to Channel 2.
If you have deliveries made after dark to your business or
home, voice and CCTV identification bring you added security.
Different sizes of telephone entry
and intercom systems.
“One size fits all“ does not apply when it comes to
choosing a telephone entry and intercom system.
Which EntraGuard solution is right for you?
For corporate campuses or high-rises, the EntraGuard
Gold (ENG-750SKHS) and Titanium (EGT-750) offer security
for up to 750 extensions.
For multiunit building complexes, such as military
installations and office parks, the EntraGuard Platinum
(EGP-500HS) handles security for up to 5000 extensions.
It’s also for applications that require a larger directory display.