Since you are using very basic Phones you have not much options.
Usually I would point you to “Busy Lamp Field” (BLF). BLF are supported on the phones you are using. They look like speed dial buttons, but light up (or change the icon) when the associated line is busy.
Unfortunately on your phones there is not much space for such buttons. So I don’t know if this would be a solution to you.
If you think about upgrading your system you might consider implementing a Presence. Which will make the status of all users available through a client on the computer?
Of course there is always the very basic busy notifier -> “Busy signal when calling a user” which works by default ;)
I can think with limithe budget on a Unity Express solution.
Here is the call flow,
Call --+ busy destination --+ call forward busy to a Call Handler --+ call handler plays "sorry the number is busy + 30 secs music" --+ call handler retry to forward the call to the "last redirected number".
You can create a calling number in unity express to specifically tell "you number is busy" and program it to retry the call to the last redirected number.
Of curse you have to have the params of "maximun number of calls and busy trigger" of 2 and 1 in CUCM.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
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setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...