R0106-HP MSR Router Series Interface Command Reference(V7)

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Default
DSU mode 0 (the Digital Link mode) is adopted, and the subrate is 44210 kbps.
Views
CT3 interface (in FT3 mode) view
Predefined user roles
network-admin
Parameters
dsu-mode: Specifies the FT3 (Fractional T3) DSU mode for a CT3 interface operating in FT3 mode.
• 0: Specifies the Digital Link mode, where the subrate is a multiple of 300746 bps and is in the range
of 300 to 44210 kbps (up to 147 rate levels are available).
• 1: Specifies the Kentrox mode, where the subrate is a multiple of 1500000 bps and is in the range
of 1500 to 35000 kbps. In this mode, the subrate can also be 44210 kbps (making a total of 57
subrate levels).
• 2: Specifies the Larscom mode, where the subrate is a multiple of 3157835 bps and is in the range
of 3100 to 44210 kbps (up to 14 subrate levels are available).
• 3: Specifies the Adtran mode, where the subrate is a multiple of 75187 bps and is in the range of
75 to 44210 kbps (up to 588 subrate levels are available).
• 4: Specifies the Verilink mode, where the subrate is a multiple of 1578918 bps and is in the range
of 1500 to 44210 kbps (up to 20 subrate levels are available).
subrate number: Specifies the subrate for the CT3 interface. The number argument is in the range of 1 to
44210 (in kbps).
Usage guidelines
FT3 (Fractional T3 or Subrate T3) mode is a non-standard E3 application mode. In this mode, the subrate
level setting varies by vendor. You can use the ft3 command to make the device compatible with devices
of other vendors operating in specific FT3 DSU modes.
This command is only applicable to CT3 boards that support FT3.
This command is only available in CT3 mode.
After you set the subrate by using the ft3 subrate command, the T3 interface searches the subrate levels
corresponding to the DSU mode in which it is operating. The T3 interface selects the subrate level that is
closest to subrate level set by the ft3 subrate command. The device adjusts the hardware to allow for the
subrate.
You can use the display interface serial interface-number:0 command to check the DSU mode setting,
the subrate, the actual rate, and the baud rate of a CT3 interface. The actual rate does not count in the
overhead bits. The baud rate is the actual T3 line rate (44736 kbps), with the overhead bits counted in.
Examples
# Configure T3 2/4/0 to operate in the FT3 mode. Set the DSU mode to 1 and the subrate to 3000
kbps.
<Sysname> system-view
[Sysname] controller t3 2/4/0
[Sysname-T3 2/4/0] using t3
[Sysname-T3 2/4/0] ft3 dsu-mode 1
[Sysname-T3 2/4/0] ft3 subrate 3000