Hello, we are attempting to connect an IP Phone headset Jack to the MC7550 VPM telephone headset jack. The telephone headset is a 4pin jack and the VMP is an 8 Pin jack. We understood from our Motorola rep that all we need to do is connect these two but we cannot find any reference on how to build the cable to connect the ports. We have had multiple companies look at it and just shrug their shoulders. Any ideas would be very welcome. thank you.
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MCC7550 IP Phone Cable Question
- Thread starter xnofatex
- Start date
VPM RJ45 phone interface:
1 Jack Sense In (–)
2 Jack Sense In (+)
3 Audio In from Phone System (–)
4 Audio Out to Phone System (–)
5 Audio Out to Phone System (+)
6 Audio In from Phone System (+)
7 Off Hook In (+)
8 Off Hook In (–)
The audio in/out is available on most VoIP phones at the headset port. The hard part is finding an off hook indication. A few phones have a relay contact or an optional module to provide one, most don’t.
If this is a VoIP phone that’s part of a 911 workstation ask your 911 vendor for info on a NENA compliant telephone/radio interface.
1 Jack Sense In (–)
2 Jack Sense In (+)
3 Audio In from Phone System (–)
4 Audio Out to Phone System (–)
5 Audio Out to Phone System (+)
6 Audio In from Phone System (+)
7 Off Hook In (+)
8 Off Hook In (–)
The audio in/out is available on most VoIP phones at the headset port. The hard part is finding an off hook indication. A few phones have a relay contact or an optional module to provide one, most don’t.
If this is a VoIP phone that’s part of a 911 workstation ask your 911 vendor for info on a NENA compliant telephone/radio interface.
I just got a notice from a vendor that is recommending they install a Radio SIP Gateway to handle the On/Off Hook. You are spot on here. thank you again.
