@b[@I[Fig. 1  Edinburgh University Data Network]]
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@b[@I[Fig. 2  Edinburgh University Speech Network]]
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@b[@I[Fig. 3  PABX/LAN Project network]]
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@b[@I[Fig. 4  Data Connection to a PABX]]
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@b[@I[Fig. 5  X25 Network Connection]]
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@b[@I[Fig. 6  Host Connection to a PABX]]
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@b[@I[Fig. 7  PABX/LAN Connection]]
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@b[@I[Fig. 8  Trunk Connection]]