Initialization• 4-4 •
The H.110 Basic Rate ISDN Board
port type parameter must be included of each of the 16
ports in the bank.
If the optional Layer 3 support is to be used, it will be necessary to set
several additional parameters for each port or B channel. The following
commands are used for that purpose:
SLb(ll...ll) This command is used to set the protocol level
supported by the board for each port in a bank of
sixteen. The bank b can be either “L” for ports 0-15
or “H” for ports 16-31. The choices are:
2 - Layer 2 support only
3 - Layer 3 support
A - AT&T Custom protocol support
D - NI-1 support (DMS-100 & 5ESS switches)
E - CACH EKTS support
N - NI-1 support (Siemens EWSD switch)
If Layer 2 support is selected, it is the responsibility of
the application to compose and interpret the Q.931
messages using the auxiliary mailboxes. Layer 3
support is provided through the “D” messages. (See
section 8.0). The D protocol level option should be
selected for Layer 3 support when operating as a TE
connected to a Nortel DMS-100 or Lucent 5ESS
switch. This option controls some aspects of TEI and
directory number usage as implemented by these
switches. The Siemens EWSD switch will operate
with either the 3 or N setting which are equivalent.
The default is Layer 2 support. The protocol level
parameter must be included for each of the 16 ports
within the bank.
SDxx(dn)/(spid) This command sets the default directory number and
SPID for each B channel xx. For a port defined as an
NT, only the directory number is specified. This is the
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