1DN(4) Kernel Interfaces Manual DN(4)
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6 dn - DN-11 ACU interface
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9 The dn? files are write-only. The permissible codes are:
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11 0-9 dial 0-9
12 : dial *
13 ; dial #
14 - 4 second delay for second dial tone
15 < end-of-number
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17 The entire telephone number must be presented in a single write system
18 call.
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20 It is recommended that an end-of-number code be given even though not
21 all ACU's actually require it.
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24 /dev/dn0 connected to 801 with dp0
25 /dev/dn1 not currently connected
26 /dev/dn2 not currently connected
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29 dp(4)
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33 DN(4)