Polycom 8020, 8030, 1725-36038-001 Push-to-talk (PTT) mode , Configuration menu mode , Messaging mode

SpectraLink 8020/8030 Wireless Telephone: Administration Guide for SIP
20 PN: 1725-36038-001_B.doc
The active mode utilizes the most bandwidth and battery power. To
conserve these resources, return the handset to the standby mode
when a call is completed by pressing the END key.
Push-to-talk (PTT) mode
The SpectraLink 8030 Wireless Telephones utilize channels for
incoming and outgoing radio communication. While PTT is active, the
handset is in PTT mode. It can receive regular phone calls in this
mode. When a regular phone call is answered, the handset enters
active mode.
Configuration menu mode
When user preferences are being configured in the Config menu, the
handset is on but is not active. It cannot receive calls while in the
Config menu.
Messaging mode
If text messaging functions have been programmed, as in a nurse call
system, the handset is able to receive text messages. While these
messages are being accessed, the handset is in messaging mode.
Incoming calls will ring with the second call ringing sound.