Hello,
Interesting looking A-Bis test equipment on eBay right now:
http://www.ebay.co.uk/itm/GN-EGM-Nettest-35-GSM-A-Bis-Test-Meter-Elmi-EGM35…
Appears to be PCM only though and I imagine of limited usefulness.
Best,
Andrew
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Andrew Back
http://carrierdetect.com