It is recommended to upgrade this Avaya Product soon.
This product uses IP lines and SIP services to transmit the voice through the internet connection to the other party (data over the signal connection). Teltek’s Nebulosity Cloud PBX and Stratus Cloud PBX are systems which provide this service. We also can adapt analog devices (like fax) to our VoIP system.
Brand:Avaya
Type:Desk Phones
Status:Manufacture Discontinued (end-of-life)
The Avaya 5621SW is an ideal choice for salespeople, executives, and operators. It is a full-featured IP phone that provides 24 programmable line and feature buttons.
Avaya 5621SW User Guide