I have a home studio for ISDN sessions – with a ProntoNet LC Codec (Speed Dial 27 for anyone who can’t get through straightaway).
My ISDN Number is: +44 (0) 207 6270 360 (twice)
The codec is supported by a Focusrite Platinum Pro Pre-amp and my mic is a Rhode NT2 A.
I can deliver dry voice, edited (cleaned up!) MP3 and Wav recordings to your email if you would prefer.