Keymile SUPM1 - Page 17

User Manual
SUPM1
page 17 of 94© KEYMILE December 2015 EN/LZTBU 372 129/1 RC
94
Functions and Specifications
Table 9: Signalling specification - pulse dialling
Feature Rating or standard
In the V5CAS mode of operation, the pulse dialling as well as the on-hook/off-hook times are defined by the custom
parameter set (CPS) of the signalling interworking unit (VOIP1 unit).
In the MCAS mode of operation, the following predefined values are used:
Pulse cadence 9 pps … 12 pps
Pulse - pause ratio (t
break
/(t
break
+ t
make
)) 0.53 … 0.72
Pulse length + pause length 90 ms … 110 ms
Pulse length (t
break
) 52 ms … 72 ms
Pause length (t
make
) 28 ms … 46 ms
Interdigit time ≥ 140 ms
Distortion (line-CAS): ≤ 10 ms
Table 10: Signalling specification - flash impulse
Feature
A flash impulse is transferred as an on-hook/off-hook signal.
In the V5CAS mode of operation, the flash detection times are defined by the custom parameter set (CPS) of the signal-
ling interworking unit (VOIP1 unit).
In the MCAS mode of operation, the flash detection times are defined by the CAS.
Note: If SUPM1 is in thermal overheat state 1 and a flash impulse is > 200 ms, then this flash impulse will interrupt the
call since it is detected as a short but valid on-hook state.
Table 11: Signalling specification - ground key
Feature Rating or standard
Detection during on-hook on the negative wire
(with normal polarity: b-wire)
Detection during off-hook on the a-wire or b-wire
Detection time ≥ 6 ms
No detection time < 6 ms
Delay (line-CAS): ≤ 100 ms
Table 12: Signalling specification - DTMF dialling
Feature
DTMF signals are transmitted transparently in the voice band. The SUPM1 does not influence the DTMF signalling.
Table 13: Signalling specification - CLIP (Calling Line Identification Presentation)
Feature
CLIP is supported. This means that on-hook VF-transmission is possible during ringing pauses, after an initial ring or
after an (initial) polarity reversal.
Table 14: Signalling specification - ringing voltage (part 1)
Feature
Each SUPM1 subscriber port has its own ringing signal source. The ringing signal is balanced, also called symmetrical.
Note: The ringing signal characteristics “ring over b-wire”, “ring over a-wire” and “ring over b-wire ringing earth-backed”
are not applicable.