Extension to Cellular
General Information
Extension to Cellular, or EC500 for short, is an optional voice
service that connects your university landline telephone with your cell
phone. Whenever someone calls your university phone, the call rings
almost simultaneously on your cell phone. This is ideal for people who
want, or need, to be both highly-available and highly-mobile. For those
times when you prefer to be less available, you can turn the service
on and off at-will.
If you already have a campus phone and a cell phone, EC500 can help
you manage your calls and get you calls faster. If you receive many
calls, but need to be away from your campus phone frequently throughout
the day, you may miss fewer calls with EC500. You can even answer a
call on your cell and then continue the call from your desk, without
having to transfer the caller or call them back when you have your hands-free.
- EC500 works with both analog and digital phones.
- EC500 works with Cornell and non-Cornell equipment. Your landline
must be a "campus" phone with service provided by CIT/NCS.
- EC500 works with any cell phone (with a ten-digit number: area code
+ exchange + extension). To avoid additional charges beyond the monthly
fee, your cell phone number must be a local call from campus.
For customers who enable EC500 for a cell
phone that is not part of the local calling region, toll charges
will be incurred every time the cell phone is used to answer a call.
(In effect, the desk phone will
be placing a long distance call to the cell phone.)
Those toll charges will be billed against the customer's desk phone.
- This technology can only bridge one campus phone to one cell phone.
- You cannot have two different campus phone numbers bridged to
the same cell phone.
- You cannot have one campus phone bridged to two different cell
phone numbers.
- You can turn this feature on and off from any phone (your campus
phone, your cell phone, or remotely from any phone) using a security
code (4 to 8 digits, user-selectable).
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Main Topics

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Some details about where calls go and how they behave and what happens
next.
(You'll find even more detail on our FAQ
page.)
- Calls placed to your campus phone make both your campus phone
and cell phone ring.
- If you answer your campus phone, the "bridge" to your
cell phone is dropped, and everything continues just like a normal
call.
- If you answer your cell phone, the bridge to your campus phone
is maintained, and you can pick up the call on your campus phone
at any point in the conversation (just like you could pick up the
extension in your kitchen after answering on the extension in your
bedroom). This can be useful if you take a call while walking across
campus and get back to your office while you're still talking.
- If you are talking on your cell phone when a call comes in, your
cell phone will do whatever it does when you're talking and a call
comes in, whether that's alerting you with a call-waiting signal,
going to voice mail, or giving the caller a busy signal.
- If you are already talking on your campus phone when a call comes
in, your campus phone will do whatever it does when you're talking
and a call comes in, whether that's ringing (as with most digital
phones), alerting you with a call-waiting signal, going to voice
mail, or giving the caller a busy signal.
- Sometimes you won't answer a call. If you don't answer (remember
that both your campus phone and cell phone are ringing), the call
will be handled by whichever voice mail / answering machine / rollover
option gets there first. Some examples:
- If AUDIX is set to answer after 4 rings, and your cell phone voice
mail is set to answer after 6 rings, AUDIX will take the call after
4 rings and the bridge to your cell phone is dropped.
- If you have your campus phone set with a coverage path (an option
that transfers calls to another extension if you don't answer),
the bridge to your cell phone is dropped when the call is transferred.
(But if your cell phone voice mail is quicker to pick up than your
coverage path, the voice mail wins; see the previous bullet).
- If you have "after-hours" programming or Send All Calls
active, that feature takes effect as a call comes in, so your cell
phone will not ring at all.
- This one is really pretty important...
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If your cell phone is unavailable (because it's turned off,
or out of range, or out of power), your cell phone's voice mail
will probably take the call right away without ringing on your
campus phone.
For this reason we strongly recommend (hint hint) that you turn
the EC500 feature off if you know your cell phone will not be
available. And we're happy to tell you that you
can turn EC500 on or off from any phone |
- Calls placed to your cell phone behave the way they always
have. Nothing new here...
A reminder about a couple of technical terms used throughout the EC500
pages:
- Activate and deactivate refer to making the feature available for
your campus phone-cell phone combination. Activation is something CIT does for you. If EC500 hasn't been activated
for you, you can't use it.
- Enable and disable (which we also refer to as turning on and turning
off) refer to you choosing when your phones will behave as if they
share a phone number, and when they won't. For example, you might enable
EC500 when you're walking across campus to a meeting, but disable
it over the weekend.
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Last modified:
May 11, 2007
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