Configuration Options
6-35
3610-A2-GB91-90
July 1999
Table 6-9
(2 of 3)
TDM Setup (MUX Funct: TDM) Configuration Options
Port Cntrl: Host
Next Host DSD Prev
Port Control. Specifies how to handle contention between the ports in a digital-sharing group. This
configuration option is displayed only if Sharing Device A is enabled.
Host
—
No port contention. Causes CTS to turn ON for any port that has RTS turned ON, even if
another port is active (RTS ON). The host protocol must enforce the order of transmission to
avoid collisions.
DSD
—
Digital-Sharing Device (port contention). Controls CTS to ensure that only one port is active at
a time. (All ports must be configured for RTS Control set to DTE.) A subsequent DTE that has
RTS turned ON does not have its CTS turned ON until the first DTE has lowered its RTS.
Selection of the next port to transmit when more than one port has raised RTS is based upon
the port; the lowest-numbered port has the highest priority.
Share DevB: Disab
Next Enab Disab Prev
Sharing Device B.
2
Enabling this configuration option allows you to create a second digital-sharing group.
This configuration option does not appear when a 2-port TDM/Flex is installed. The following rules apply:
•
All ports in a group must have the same port speed.
•
All ports must be adjacent.
•
A digital-sharing group can have from 2 to 6 ports.
Enab
—
Enables the digital-sharing feature.
Disab
—
Disables the digital-sharing feature.
Lowest Port #: 3
Next 1 2 3 4 5 Prev
Lowest Port Number. Allows selection of the lowest port number to be included in the digital-sharing group.
This configuration option is displayed only if Sharing Device B is enabled and a 6-port TDM is installed.
1 to 5
—
Selects the lowest port number.
# Ports in Gp: 2
Next 2 3 4 5 6 Prev
Number of Ports in Group 2. Allows selection of the total number of ports to be included in the second
digital-sharing group. This configuration option is displayed only if Sharing Device B is enabled and a 6-port
TDM is installed.
Enabling Sharing Device B and accepting the defaults for configuration options Lowest Port Number and
Number of Ports in Group places Ports 3 and 4 in the digital-sharing group.
Individual ports in a digital-sharing group can be configured for streaming terminal. If streaming terminal
detection is enabled on a port and RTS for that port is ON longer than the value selected for that port, the
port’s leads are clamped until RTS is turned Off.
2 to 6
—
Selects the number of ports.
2
For an LPDA-2 configuration, only Sharing Device A can be used to create a digital-sharing group.
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