Buy Phone Hardware Back To Homepage TM-3000-SC Tower Solar Cellular Help Phone This is the solar powered, cellular version of the TM-3000. This model is 13 feet tall and is ideal for use in athletic fields, hiking and jogging trails, lakes and beaches where electricity and landline phone service are unavailable. The Tower Phone requires landline telephone and electricity. The Tower Cellular Phone is the same rugged design, but uses cellular rather than landline phone service. The Night Time Charge Phone is a cellular emergency telephone with night time charge circuitry and light pole mounting bracket. Mounts to existing poles and charges off parking lot lighting circuit. Choose the solar model based on winter sun duration:Standard (40), Moderate (80), or Low (120).