The J139 telephone is a SIP telephone supported on systems with Release 11.0 Service Pack 1 or higher software.
2.8" Color display (320 x 240).
12 programmable button slots for call appearance and feature buttons.
The button slots can be arranged in either 3-pages of 4 (dual-column mode) or 6-pages of 2 (single column mode).
4 twin-LED (red and green) physical buttons are used to indicate the status of the programmable button slots currently in view on the display.
4 Additional buttons under the primary display. These are used for context-sensitive soft key functions. The buttons current function is indicated by the display label above it. See Call Soft Keys.
Illuminated buttons for missed calls/call log, speaker, headset and mute.
Non-illuminated buttons for messages, contacts, phone and configuration menu access.
Call alerting/message waiting indication lamp.
Dual 10/100/1000 Mbps Ethernet ports. One for phone network connection. One for PC pass-through to allow co-location with a user PC.
The phone includes a two-position desk stand. An optional wall mounting stand is available.
The J100 Series phones support the following audio codecs on IP Office: G.711, G.726a, G.729, G.729a, G.729ab, G.722.
Power via either PoE (Power over Ethernet). The phone is a PoE Class 1 device. An optional 5V power supply unit is available for locations where PoE is not available or suitable.
The phone is similar to the other J100 Series phones but only supports a sub-set of features. See J139 Restrictions.