Cti Communications Ltd
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SIP to ISDN converter - SIP gateway

If your current ISDN phone system doesn't support SIP and you want to take advantage of VoIP phone lines without changing it then you need a SIP to ISDN converter (SIP gateway).

We will configure the SIP to ISDN converter / SIP gateway with the details of your chosen SIP provider, you unplug from the ISDN & plug into the SIP to ISDN converter and start saving money.

Select the correct unit below to match your type of ISDN & the number of channel. New lower prices.

ISIP 8 - 1 BRI (2 channels) 320 180
ISIP 8 - 2 BRI (4 channels) 480 240
ISIP 8 - 3 BRI (6 channels) 550 300
ISIP 8 - 4 BRI (8 channels) 660 360
ISIP 30 - 10 channels 820 560
ISIP 30 - 20 channels 1,010 760
ISIP 30 - 30 channels 1,200 960

The ISIP SIP to ISDN converter / SIP gateway connects to a PoE class 1 supply. If you don't have one we can supply them for 20 and you will need us to set it up and configure it for 20.


All prices exclude VAT, and were correct on 06/10/2017 15:40:29 , but should only be used as a guide.