User manual NEC MH120

[. . . ] Mobile Handset 120 and Desktop Charger/ Gang Charger User Guide NEC Business Solutions Ltd. Doc. No: NEC-9121 Revision 2 July, 2005 Liability Disclaimer PLEASE NOTE: It is recommended that standard acceptance procedures be followed prior to operating this equipment in proximity of life-support systems. To minimize risk of interference, pacemaker users should not carry the Wireless Telephone next to the pacemaker. Operation of the Wireless Telephone may produce an audible noise noticeable to hearing aid users. [. . . ] · Press FCN + 2 to use the shortcut key. · Press MENU + 2. Refer to the example of using the shortcut keys on page 2-4 for more information about using MENU + 2. REFERENCE Using Push to Talk (PTT) The push-to-talk feature allows MH120 Wireless Telephones to operate in a push-to-talk (PTT) group broadcast mode in addition to the standard telephone operation. This feature is similar to Push-to-talk radios, or walkie talkies. The MH120 Wireless Telephone supports 8 multicast channels with the current channel saved in memory on the phone. A PTT call is initiated by pressing the Talk button located on the right side of the handset. All MH120 Wireless PTT dialogue is interrupted when you answer a PBX call. When the PBX call is ended, PTT dialogue resumes if it is an active call. The different push-to-talk features and terminology are discussed in the following sections. Selecting a Channel See "Setting User Preferences" on page 2-10. Mobile Handset 120 and Desktop Charger/Gang Charger User Guide - Revision 1 MH120 Wireless Telephone 2-7 The Call Period The two-way radio operates on the concept of a push-to-talk session or call period. The push-to-talk call period begins with the first transmission and ends when there has been no two-way radio traffic on the channel for 10 seconds. The PTT mode controls the keypad during a push-to-talk call period. Therefore, it is not possible to use the keypad for any other function, such as accessing the on-hook menus or accessing an OAI application. However, it is possible to place a PBX call (see below). Initiating Calls Press the Talk button and wait two seconds to activate the channel before talking. The "start transmit" sound will play when you may begin talking. Transmitting Calls Use the following steps to transmit calls. Step 1 Step 2 Initiate a call. Talk into the microphone while holding the Wireless Telephone two inches from your mouth. Release the Talk button when finished talking. The "end transmit" sound plays. The MH120 Wireless Telephone then enters the waiting state where it monitors the channel for up to 10 seconds. Step 3 (Optional) To initiate subsequent transmissions on the MH120 Wireless Telephone, press the Talk button, using the same channel. The "start transmit" sound plays immediately and the user can start talking. The display screen shows the current active channel. Since all phones on that channel are already in the receive state, there is no two-second delay. If no transmission occurs during the 10-second countdown period, the MH120 Wireless Telephone plays the "end call" sound and reverts to the idle state. If you inadvertently press any other button or key on the Wireless Telephone while transmitting a call, the call will be terminated. CAUTION Receiving Calls When a PTT transmission is received the phone plays the "receiving alert" sound and enters the receive state. In this state the phone receives all conversations on the selected channel. The phone ignores the Talk key while in the receive state. [. . . ] · Isopropyl alcohol may be used occasionally, applied by a cloth or paper towel. · When using alcohol, do not rub the keypad characters vigorously. Doing so will significantly degrade legibility. DO NOT SPRAY THE HANDSET DIRECTLY! IMPORTANT · Pre-treated cloths such as used for eyeglasses or cameras may be used to clean the phone. Pre-moistened towelettes may also be used to clean the phone, however, avoid those containing lanolin or aloe as it will leave a slippery residue. [. . . ]