it is considered TNV-1 and needs to meet overvoltage
construction/test (connects to outside wiring plant)
At 09:12 PM 2/4/99 +0200, you wrote:
>Dear All,
>
>Is an ISDN U Interface considered a TNV-3 or a TNV-1 for North
>America (US and Canada) and why? I rteckon it is TNV-1 since
>voltage levels do not exceed SELV levels. Please confirm.
>
>For Europe, the ISDN U-Interface is a TNV-3.
>
>Looking forward to your responses.
>
Janusz Purwin
Xedia Corp
119 Russell St.
Littleton Ma 01460
Tel 978-952-6000 ext 166
Fax 978-952-6090
email; [email protected]
