Follow these guidelines when configuring the MTP layer for Japan-NTT network operation:
Set the LINK_TYPE attribute for all links, NSAPs, and route entries to JNTT.
The point code length for links and NSAPs defaults to 16 after the LINK_TYPE is set to JNTT. If desired for documentation purposes, the point code length can be explicitly set to 16 (the only supported value for JNTT link type) in the link and NSAP configurations.
Specify the 16-bit point codes in either hexadecimal or x.y.z dotted notation. Specify hexadecimal point codes in the order in which they are transmitted on the link: the U-code in the most significant seven bits, the S-code in the next four bits, and the M-code in the least significant five bits. To specify J-NTT 16-bit point codes in x.y.z notation, set the PC_FORMAT parameter in the MTP 3 general configuration section to the value JNTT.
For example:
PC_FORMAT JNTT
...
LINK S1
LINK_TYPE JNTT
ADJACENT_DPC 1.1.2
...
is equivalent to:
...
LINK S1
LINK_TYPE JNTT
ADJACENT_DPC 0x421
...
The following sample MTP 3 configuration file configures two TDM ports with the JNTT protocol variant:
#-----------------------------------------------------
# Sample MTP3 configuration for J-NTT protocol variant
#-----------------------------------------------------
#Overall MTP3 Parameters
#-----------------------
#
NODE_TYPE SP # choose STP [routing] or SP [non-routing]
PC_FORMAT JNTT
POINT_CODE 1.1.1
RESTART_REQUIRED FALSE
MAX_LINKS 4
MAX_USERS 2 # isup + 1 extra
MAX_ROUTES 64
MAX_ROUTE_ENTRIES 1024
MAX_LINK_SETS 2
MAX_ROUTE_MASKS 1
ROUTE_MASK 0xFFFFFFFF
END
#
#Link Parameters
#---------------
#
# Link 0
#
LINK T1 # TDM port 1
LINK_SET 1
LINK_TYPE JNTT
ADJACENT_DPC 1.1.2
LINK_SLC 0
END
#
# Link 1
#
LINK T2 # TDM port 2
LINK_SET 1
LINK_TYPE JNTT
ADJACENT_DPC 1.1.2
LINK_SLC 1
END
#
#User Parameters (NSAP definition)
#---------------------------------
#
NSAP 0 # isup
LINK_TYPE JNTT
END
#
NSAP 1 # spare
LINK_TYPE JNTT
END
#
#
#Routing Parameters
#------------------
#
# Route UP from network to applications on this node
#
ROUTE 0
LINK_TYPE JNTT
DPC 1.1.1 # this node
DIRECTION UP # default is DOWN
ADJACENT_ROUTE FALSE
END
#
# Route to Adjacent node
#
ROUTE 1
LINK_TYPE JNTT
DPC 1.1.2
END
#
#
# Linkset Parameters
#-------------------
LINK_SET_DESCRIPTOR 1
ADJACENT_DPC 1.1.2
MAX_ACTIVE_LINKS 4
ROUTE_NUMBER 1
END
#