Instruction manual

TECHNICAL SPECIFICATIONS
Port Specifications (Contd)
5-14
VOICE TERMINAL PORTS
STATION TYPE
CIRCUIT PACK
SPECIFICATIONS
Tip and Ring
Tip Ring Line
Single-Line
(ZTN78)
● 1-Pair Interface (Tip and Ring)
Sets
(Analog)
● Analog signals modulated over DC loop
● Loop Voltage: 24 V dc
● Signaling: Dual Tone Multifrequency (DTMF)
or Dial Pulse
● REN (max.): 1.2
● DC Current (max.): 35 mA
● Loop Range (24 AWG): 2,000 feet
● In-building service only
Tip and Ring
Analog Line
Single-Line
(TN742)
● 1-Pair Interface (Tip and Ring)
Sets
(TN746B)
(Analog)
● Analog signals modulated over DC loop
● Loop Voltage: 48 V dc
● Signaling: Dual Tone Multifrequency (DTMF)
or Dial Pulse
● REN (max.): 5.0
● DC Current (max.): 40 mA
● Loop Range (24 AWG): 17,500 feet
● Supports Out-of-Building, Extended (greater
than 2000 feet), Off-Premises, and Bridged
Station services (maximum of five bridged
stations, and two off-hook simultaneously).