MP-1xx SIP
MP-1xx SIP User’s Manual 166 Document #: LTRT-65404
Figure 8-4: MP-108 FXS & FXO Remote IP Extension
8.9.4.1 Dialing from Remote Extension
(Phone connected to MP-108/FXS)
To configure the call, take these 6 steps:
1. Lift the handset to hear the dial tone coming from PBX, as if the phone was connected
directly to PBX.
2. MP-108/FXS and MP-108/FXO establish a voice path connection from the phone to the PBX
immediately the phone handset is raised.
3. Dial the destination number (the DTMF digits are sent, over IP, directly to the PBX).
4. All tones heard are generated from the PBX (such as Ringback, busy or fast busy tones).
5. There is one-to-one mapping between MP-108/FXS ports and PBX lines.
6. The call is disconnected when the phone connected to the MP-108/FXS goes onhook.
8.9.4.2 Dialing from other PBX line, or from PSTN
To configure the call, take these 5 steps:
1. Dial the PBX subscriber number the same way as if the user’s phone was connected directly
to PBX.
2. Immediately as PBX rings into MP-108/FXO, the ring signal is “send” to phone connected to
MP-108/FXS.
3. Once the phone’s handset, connected to MP-108/FXS, is raised, the MP-108/FXO seizes the
PBX line and the voice path is established between the phone and the PBX line.
4. There is a one to one mapping between PBX lines and MP-108/FXS ports. Each PBX line is
routed to the same phone (connected to MP-108/FXS).
5. The call is disconnected when phone connected to MP-108/FXS goes onhook.
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