Ppp_Acm - Bay Networks 6300 Supplement Manual

Chapter 2 Configuration Parameters
Remote Annex 6300 Supplement to the Remote Annex Administrator's Guide for UNIX
C-84

ppp_acm

This asynchronous port parameter (async control mask) specifies which
of the first 32 bytes (0x0 to 0x1F) of the ASCII character can be sent as
clear text and which should be protocol-escaped.
The RA 6300 requests the ppp_acm parameter as its local mask. If the
peer rejects ppp_acm, the RA 6300 accepts the hint if it is a superset of
the RA 6300's mask; otherwise, it uses the PPP default of 0xFFFFFFFF.
The RA 6300 accepts any mask from the peer. Values range from
0x00000000 to 0xffffffff. The RA 6300 default is 0x00000000.
The ppp_acm parameter is a bit mask that is set as follows:
• ppp_acm for ASCII NUL (decimal 0) is 2 to the power of 0 =
0x00000001
• ppp_acm for ASCII SOH (decimal 1) is 2 to the power of 1 =
0x00000002
• ppp_acm for ASCII DC1 (decimal 17) is 2 to the power of 17 =
0x00020000
• ppp_acm for ASCII DC3 (decimal 19) is 2 to the power of 19 =
0x00080000
Thus, the mask for XON/XOFF (DC1 and DC3) equals the OR function
of 0x00020000 and 0x00080000, or 0x000a0000.
When the RA 6300 sends an ACCM to the host, it follows this calculation
to determine the initial value requested:
• The value set for ppp_acm (a 32-bit integer) is read in as the
ACCM.
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