I am a Network/PC administrator. I need help installing a refurbished ESI 60D on a IP900. I have available licenses on my IP 900. It is a segregated network without a vlan. I tried connecting the 60D, entered the installers password, entered the next extension number... But it says "extension was invalid". Do i have to add the extension first? If so how? Sorry for the noob question, this is my first post. Anyone have installers guide? I have IP 900 & phone user and admin manuals.
Thank you

The 60D is a proprietary digital phone, not an IP phone.
60D doesn't need a license, a 60IP would.


Also, if it is a 60IP that you are trying to add you will need an IVC channel available.

As a rule of thumb, if the information is not in the users or administrators guide, we do not post it in the forum. However, it's it's available with an internet search then it's generally not an issue; that being the case the end-user can generally find it themselves.

Such as found on this website:

https://www.cleartelecommunications.com/esi

Thanks for the response.
On the phone the sticker says ESI 60 ABP 10/100 IP.

How do I "Also, if it is a 60IP that you are trying to add you will need an IVC channel available"? Is that in the F8** areas?

I tried connecting the Phone (ESI 60 ABP 10/100 IP), entered the installers password (on the phone), entered the next extension number (on the phone) ... But it says "extension was invalid". How do I to add the extension first (to the phone system)?

Sounds like you need an additional license. If I was in your shoes I would get your installer in to confirm and then buy the license if needed.