Max. permissible current 120 mA
Receive path E (type 2)
Input resistance at I = 10 mA 2700 ohms
Operating current < 10 mA
Internal power supply -48 V
Protocols
To ANSI/EIA/TIA-464-A, configurable Immediate Start
Wink Signal
Delay Signal
Signalling method DP or DTMF
Characteristics of the signalling protocols
The connection of two switching units via a tie trunk requires that the protocol used be supported by
both systems. Hicom 150 E OfficePro supports:
"Immediate start" protocol
No seizure acknowledgement; with answer signal.
This protocol is the most widely used protocol on an international level.
"Wink signal" protocol
Proceed-to-send signal by means of a "wink" signal; with answer signal.
This protocol corresponds to "immediate start" with the addition of a proceed-to-send signal. It
is most useful for connecting systems that are not immediately ready for digit input.
"Delay signal" protocol
Dialling delay time by means of "delay" signal; with answer signal.
This protocol permits the transmission of dialling information to be delayed until the receiving
exchange is ready. It only differs from the "wink signal" protocol insofar as the partner system
returns a backward signal immediately after seizure even if the system is not ready for digit
input.
Switches and LEDs
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