User Manual
SUPM1
page 51 of 94© KEYMILE December 2015 EN/LZTBU 372 129/1 RC
94
Functional Description
• a-b-Wires Disconnected:
An information element (IE) “pulsed no battery” causes a disconnect of
both wires.
• a-Wire Disconnected:
An information element (IE) “pulsed no battery” disconnects the a-wire
only. The b-wire remains on -V
BAT
(negative battery voltage).
The pulse duration is defined in the custom parameter set of the signalling
interworking unit VOIP1. Please refer to [452] User Manual “VOIP1
voip1_r2”.
5.10.1.5 Reduced battery
Supported.
5.10.1.6 CLIP
Calling Line Identification Presentation (CLIP) is an on-hook voice-frequency
transmission. An initial ring or a polarity reversal signal is used as an indica-
tion that CLIP will follow as in-band tones.
In support of CLIP, the SUPM1 unit opens the voice path to the line upon
reception of any PSTN CAS signal in the on-hook state.
5.10.2 Upstream PSTN Signals
The following upstream PSTN signals towards the softswitch (H.248/MEG-
ACO, SIP), V5 or Mercury CAS enabled switch are supported.
5.10.2.1 On-hook / off-hook detection
Supported.
5.10.2.2 Pulse dialling
Supported.
5.10.2.3 DTMF dialling
DTMF signals are transmitted transparently in the voice band. The SUPM1
does not influence the DTMF signalling.
5.10.2.4 Flash pulse
Supported.
5.10.2.5 Ground key
Supported.
To Next Page
Loading...