Selecting the Type of Clocking on Serial Ports for CTP Bundles
(CTPView)
This topic describes how to select the type
of clocking that you want to use on serial ports. The type of clocking
supported depends on the type of encoding you are using.
Before you begin:
- Log in to the CTPView software at least at the Net_Admin
level.
- Connect the CTPView server to the CTP device for which
you want to configure bundles.
- Disable the bundle before you modify the bundle options.
To specify the clocking type for CTP bundles
using CTPView:
- In the side pane, select Bundle > Configuration.
- Run your mouse over the Display and
Select an Existing Bundle bar.
- In the table of bundles, select the bundle that
you want to modify.
- Under Port Options,
select a clocking type in the Clock Cfg field. Table 1 describes
the clocking types that are supported for each encoding type.
- Click Click to Submit Bundle AND Port
Changes.
Table 1: Clocking
Type Supported for Each Encoding Type as Displayed in CTPView
Encoding Type | Clocking Type Supported |
---|
NRZ and TDM with interface mode set to DCE. | You can specify the following clocking methods
for NRZ and TDM circuits with DCE mode specified: - Cfg Rate - Int Clk—Configured rate without external
TX clock (TT). The CTP device synthesizes the rate that is used on
the ST and RT outputs to the attached device. The ST is used to sample
Send Data from the attached DTE. The clock is created by the CTP DDS
circuitry and logic. This option is commonly used on circuits that
are less than 1 Mbps.
- Cfg Rate - Ext Clk—Configured rate with external
TX clock (TT). The CTP device synthesizes the rate that is used on
the ST and RT outputs to the attached device. The clock is created
by the DDS circuitry and logic. This option is used to sample Send
Data from the attached device. Assumes that the attached device is
using ST or clock reference traceable to CTP reference. Typically
used for higher data rates (>1 Mbps) and long cable.
- All Clock - Ext Clk—All clocked with external TX
clock (TT). The CTP clock uses the external TT timing from the DTE
for all clocking. Ext TT is used to sample Send Data from the attached
device, to generate the RT clock, and to clock data into the IP network.
- Adap Rate - Ext Clk—Adaptive clocking with external
TX clock (TT).
- Adap Rate - Int Clk—Adaptive clocking with internal
clock.
- Auto Rate - Int Clk—Autobaud rate with internal
clock.
- Auto Rate - Ext Clk—Autobaud rate with external
clock.
- TDM/TDC Interleaved Slow Port—Available only on
odd-numbered ports. Use this option for the low-speed port of a domain
correlation (TDC) circuit.
- Custom—The custom clocking configuration is used.
|
NRZ and TDM with interface mode set to DTE | You can specify the following clocking methods
for NRZ and TDM circuits with DTE mode specified: - Custom—The custom clocking configuration is used.
- DTE, All Clocked by Ext Clk (ST/RT)—The DCE equipment
provides all clocks. The ST input clock is used to clock out the external
transmit clock (TT) and the send data (SD). The RT input clock is
used to clock in the receive data (RD).
|
ISOCH | You can specify the following clocking methods
for ISOCH circuits: |
CDI | You can specify the following clocking methods
for CDI circuits: |
MSTAR | You can specify the following clocking methods
for MSTAR circuits: |
TRANS | You can specify the following clocking methods
for TRANS circuits: |
Published: 2011-01-09