These units all include the KeyTek 424 mainframe along with the networks listed below. The network is available for rent alone. Voltage is given open-circuit, Current is given short-circuit.

Part #	Description	Max V	Waveshape	Current
241	Classic telecom	1.5kV	1kV/microsec .10X1000	60 or 15
242	Component test	1kV	8X20	20 to 500
247	Component test	1.5kV	<4X40	2000
248	FCC Telecom	1.5kV	<10X>160,<10X >560	200,100
251	Telecom (incl. 210 &211 units)	1.5kV	1kV/microsec	500
281	AC (UL) line surge-ring wave	6kV	.5 microsec, 100Hz	200
282	FCC line surge	2.5kV	<2X10> on AC line	>1000
293	Telecom (incl. 210 & 211 units)	1kV	<10 x >360	<1000
294	Telecom (incl. 210 & 211 units)	1kV	10x1000	100
FCC68	FCC package -248 & 282 networks
UL2	Includes both the 281 & 286 networks