EC500 - Routing your University Extension to Cellular

Tags EC500


EC500 is a feature of university's phone system that allows an incoming call to your university extension to also ring on a remote number, outside of our system. This can be your mobile phone or a home number.  The feature can also be used to "transfer" an active call to your remote number.

This feature must be initially setup by the Telecom office, and is only available for multi-line office extensions. Once enabled for your extension, Telecom will provide a button on your office phone that will allow you toggle the feature on and off. You can also turn the feature on and off, or change the remote number, using the touch-tone instructions described here. If desired, Telecom can also provide the extend call button on your phone, which will allow you to continue an active call at your desk, on your remote phone (see below).

The remote access phone number for controlling EC500 is 804-287-6010. You will also need to know your Station Security Code (SSC), which will be assigned by the Telecom office at the time we configure this feature for you.

It is important to remember that all EC500 calls answered on the remote phone are also active on your desk extension for the duration of the call.  This means that someone can pick up your desk extension, and listen to and participate in the conversation.  For this reason, we have a ‘Barge Tone’ enabled – if you hear a solid tone for about 3 seconds, it means that someone has ‘barged’ into your conversation using your desk extension.

Details / Instructions

Controlling EC500:

The following touch-tone commands are performed using the number-pad on any phone.

In the following instructions: [extn] is your 4-digit office extension, and [code] is the unique Station Security Code that was assigned to you; Bolded text should be keyed in just as shown.

  • Enable (turn on) EC500:          720[extn]#[code]#
  • Disable (turn off) EC500:         721[extn]#[code]#
  • Change Remote Phone #:       722[extn]#[code]#1[new 10-digit phone number]#

Following successfully entering each of the above commands, the phone system will respond with 3 short tones.

In the following examples: 6243 is the 4-digit office extension, and 873986 is the unique Station Security Code that was assigned.  Spaces are used to separate the command parts for illustration, but are not part of the command or keyed in during the process.

To turn on EC500: 

  • Dial the remote access number 804 287 6010 (you will hear a secondary dial-tone)
  • Dial 720 6243# 873986# (you should hear three short tones)
  • Hang-up

To turn off EC500:

  • Dial the remote access number 804 287 6010 (you will hear a secondary dial-tone)
  • Dial 721 6243# 873986# (you should hear three short tones)
  • Hang-up

To change the remote number that EC500 will ring (for this example 804-555-1212 is the new remote number):

  • Dial the remote access number 804 287 6010 (you will hear a secondary dial-tone)
  • Dial 722 6243# 873986# 18045551212# (you should hear three short tones)
  • Hang-up


Extend Call:

The extend-call feature is useful when you are currently on a call with your office phone, and wish to leave your desk without ending the call.  When Telecom configured your EC500, we may have also placed an 'Extend Call' button your phone.  Simply press this button, and few seconds later your mobile phone will ring.  Answer the call on your mobile phone, and hang-up your desk phone.


Voicemail and EC500:

Your university extension is likely setup to send a call to voicemail after 3 rings, if not answered; however, many cell providers provide for 5 of more rings before sending a call to voicemail.  For this reason, if you do not answer an EC500 call within 3 rings, the phone system will send the call to your university voicemail.  If you decline the call on your remote phone, the call will go to your remote vociemail.  We have also noticed that in the event that your remote phone has an incoming call, and is actively ringing, when another call comes in, mobile providers will send the second call directly to voicemail.

When EC500 is enabled, and the phone system sends an incoming call to your remote number, the phone system cannot be sure whether it was you or your remote voicemail that answered the call.  For this reason, we suggest frequently checking your university voicemail to make sure there are no messages.

See Also

Request EC500


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Article ID: 100143
Fri 3/6/20 10:07 AM
Thu 3/12/20 3:09 PM