Cti Communications Ltd
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SIP to ISDN converter

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.

We will configure the SIP to ISDN converter 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

ISIP 8 - 1 BRI (2 channels) 320
ISIP 8 - 2 BRI (4 channels) 480
ISIP 8 - 3 BRI (6 channels) 550
ISIP 8 - 4 BRI (8 channels) 660
ISIP 30 - 10 channels 820
ISIP 30 - 20 channels 1,010
ISIP 30 - 30 channels 1,200

The ISIP SIP to ISDN converter 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 18/04/2017 17:33:48 , but should only be used as a guide.