Customers will often call in to ask us to recommend a phone that will work well with their CS50. Remind the Customer that we have less expertise as Telephone experts, however, we have found that most Panasonic and Nortel phones work well with wireless headsets. If the Customer would like specific model numbers, then here are phones that we know work well. Single Line Telephones: Nortel Meridian 3902 (M3902) Aastra (Nortel) M8009 Panasonic KX-TS105 – Available at Radio Shack Two Line Telephones: Cortelco 2720 – Available at Headsets.com ! (DISCONTINUED!) Panasonic KX-TSC14 – Available at Office Max, Office Depot and Radio Shack Panasonic KX-TS3282– Available at Office Depot and Radio Shack Panasonic KX-TS208 – Available at Radio Shack Multi-line Telephones: Nortel Meridian 7310 Nortel Meridian 7208 Panasonic KX-T 7433