[. . . ] To answer a call, press the START key and hold the earpiece to your ear. If you are on a call and hear subdued ringing, a call is coming in on a second line. To answer this call, put your first call on hold and press the line key then the line number of the second call. [. . . ] Press the key(s) for the desired feature, or press FCN again to display more options. Because softkey and system features vary, your system administrator will explain them for your telephone system. Setting User Preferences Standby menu When the Wireless Telephone is on but not in use, press and briefly hold FCN to display menus. Check with your system administrator for specific features supported by your Wireless Telephone. Volume Level The Wireless Telephone has two volume levels, low and high. Vibrator Ring works only if your Wireless Telephone has the optional vibrating ringer. Changes or modifications not expressly approved by SpectraLink could void the user's authority to operate the equipment. â· It is recommended that standard acceptance procedures be followed prior to operating this equipment in proximity of life-support systems. â· 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. It is recommended that a hearing aid compatible headset be used by hearing aid users. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Battery Packs About Battery Packs The Wireless Telephone will need to have its Battery Pack recharged periodically. The Nickel Metal Hydride (NiMH) rechargeable Wireless Telephone Battery Pack gives you four hours of talk time or 80 hours of stand-by time. [. . . ] Slide the Battery Pack toward the bottom of the Wireless Telephone until it stops, then lift up. To replace the Battery Pack, first properly align the top of the Battery Pack with the arrows on the label on the back of the Wireless Telephone. Gently press and slide the Battery Pack toward the top of the Wireless Telephone until it snaps into place. [. . . ]