Configuration Option Tables
4-33610-A2-GB46-60 December 1996
Table 4-1
(2 of 3)
DSU Configuration Options
Msg Clamp: Enab
Next Enab Disab Prev
Message Clamping. Controls the data leads when disruptive diagnostic tests and commands are received from the
remote DSU. This configuration option applies to both the DSU and DBM.
When Disr Type is set to 3600e (see Table 4-2), as required for 64CC service, and Msg Clamp is set to Enab, the DSU
sends the escape header portion of a diagnostic message to the DTE before detecting an escape header and invalid
data. However, the DSU does clamp the ensuing command portion of the message.
Enab – Received Data (RXD) is held to MARK and LSD is turned Off during diagnostic exchanges. This prevents
diagnostic messages from reaching the DTE interface.
Disab – DSU passes diagnostic messages to the DTE interface. Use the Disable setting if the remote DSU is configured
for switched RTS (RTS Control set to DTE, Table 4-4).
TxElasStor: Disab
Next Enab Disab Prev
Transmit Elastic Store.
4
Elastic store hardware consists of a transmit buffer on the DSU’s transmitted data (TXD) lead.
Serial data from the extended circuit is clocked into the DSU’s elastic store using a clock provided by the DTE’s receive
clock lead. The DSU uses its own system timing to clock data out of the buffer.
Enab – Enable this configuration option if you have an extended network. Transmit Elastic Store resets upon power-up,
overflow, or after the request-to-send lead makes an Off-to-ON transition. Use TxElasStor to minimize the effects of
clocking differences from different sources.
Disab – Disable this configuration option if you do not have an extended network.
RxElasStor: Disab
Next Enab Disab Prev
Receive Elastic Store. Receive Elastic Store hardware consists of a receive buffer on the DSU’s received data (RXD)
lead. The Receive Elastic Store configuration option is supported in single port DSUs configured for disruptive
diagnostics.
Enab – Enable this configuration option if you have an extended network, and when interfacing to a DTE or DCE that
provides its own clock source and supports the Transmit Elastic Store configuration option.
Disab – Disable this configuration option if you do not have an extended network.
19.2 PowrLvl: +6
Next +6 0 –10 Prev
19.2 kbps Power Level. Selects the appropriate power level, in decibels, for operation at 19.2 kbps. This configuration
option appears when Rate(Kbps) is set to 19.2 kbps.
NOTE: When the App Module ID displays XLOOP, setting the Rate(Kbps) configuration option to 19.2 kbps filters this
configuration option and results in a DDS network service of +6 dB. Refer to Table 3-2 for ID descriptions.
+6 – For DDS network service.
0 – For alternate DDS service.
–10 – For LADS operation.
4
In TDM or MCMP mode, the DSU’s Transmit Elastic Store settings are ignored; instead, this configuration option is
selected on a per-port basis in the MUX Port
n
menu.
In Bridge mode with MUX Funct set to CBrdg, the Transmit Elastic Store configuration options for Port 1 are ignored
(automatically disabled).
To Next Page
Loading...
