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Configuration Options
C-133160-A2-GB21-50 January 1997
Table C-5
(2 of 3)
Data Port Channel Configuration Options
Port Rate: 384
Next 64 128 192 256 320 384 448 512 576 640 704 768 832 896 960 1024 1088
1152 1216 1280 1344 1408 1472 1536 Prev
OR
Next 56 112 168 224 280 336 392 448 504 560 616 672 728 784 840 896 952
1008 1064 1120 1176 1232 1288 1344 Prev
Data Port Rate (appears when using the block or ACAMI channel allocation method, or when a synchronous data port is
assigned to another synchronous data port). Designates the data rate for the port. Available selections depend on the
current base rate configured for the port. The factory default for Nx64 is 384 kbps, and Nx56 is 336 kbps.
NOTE: This configuration option does not appear if the individual channel allocation method (Chan) is selected using the
Assign By configuration option.
NOTE: Changing this configuration option from one rate to another deallocates all DS0 channels assigned to either the
network interface or the DTE Drop/Insert (DSX-1) interface.
NOTE: When you enable EDL (for 2-port and 4-port DSU/CSUs), 8 kbps of the total bandwidth allocated for this port is
not available to the synchronous data port. For example, if you select 256 kbps and EDL is enabled, only
248 kbps are available.
NOTE: When you enable EDL (for 2-port and 4-port DSU/CSUs) on a synchronous data port and the clock source is set
to that synchronous data port, the external device must provide a clock of 8 kbps less than the expected data
port rate. For example, if you select 64 kbps, the external clock source must supply a 56 kbps clock signal.
NOTE: For the 3164 DSU/CSU there is a hardware limitation that limits the combined bandwidth used by Port 1 and
Port 3 to a total of 2048 kbps and the combined bandwidth used by Port 2 and Port 4 to 2048 kbps. Thus, when
entering this menu, the rate choices are limited due to this constraint. This limitation only occurs in configurations
mapping a port to a port or when mapping ports to the DTE Drop/Insert (DSX-1) interface and to the network.
Start At:
Next Clear N1 N2 N3 N4 N5 N6 N7 N8 N9 N10 N11 ... N24 Prev
OR
Start At:
Next Clear D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 ... D24 Prev
Data Port Channel Allocation (appears for the block and ACAMI methods only). Designates the starting DS0 channel,
N1–N24 for the network interface and D1–D24 for the DTE Drop/Insert (DSX-1) interface.
Available selections are only those DS0 channels that provide enough bandwidth (based on the configured data rate) to
be used as a starting channel number.
Select the desired starting channel number by pressing the Function key under that number. When you make the
selection, the DSU/CSU allocates the correct amount of DS0 channels to support the data rate currently configured for
the port.
Clear – Deallocates all DS0 channels for this port from the network interface or the DTE Drop/Insert (DSX-1) interface.
NOTE: This configuration option is not available if the individual channel allocation method (Chan) is selected using the
Assign By configuration option, or if Prt
n
is selected using the Assign To configuration option.