4. Configuration Options
4-42 September 2002 9128-A2-GB20-80
Action on Network Yellow Alarm
Possible Settings: None, Halt
Default Setting: Halt
Specifies the action to take on the synchronous data port when a yellow alarm is received
on the network interface. (A yellow alarm indicates a problem with the si gnal being
transmitted to the network.)
Display Conditions
– This option only appears for Port-2 on a FrameSaver SLV 9128-II,
when Port Use is set to Synchronous Data.
None – No action taken when a yellow alarm is received.
Halt – Halts the transmission of data received on the synchronous data port and all ones
are sent on circuit BB (ITU 104) – Receive Data (RD) and circuit CB (ITU 106) –
Clear-to-Send (CTS) is deasserted to the port when a yellow alarm is received.
Network Initiated Data Channel Loopback
Possible Settings: Disable, V.54, ANSI_FT1, V.54_&_ANSI
Default Setting: Disable
Allows the initiation and termination of the Data Channel Loopback (V.54 Loop 2) to be
controlled by the receipt of a DCLB-actuate and DCLB-release sequence (either V.54, or
FT1 [ANSI] compliant sequences) from the network or far end unit. When this
configuration is enabled (V.54, FT1, or Both), receiving a DCLB-actuate sequence on a
particular port causes the unit to initiate a DCLB on that port (provided that a DCLB can
be performed based on the current state of the port and unit). Receiving a DCLB-release
sequence terminates the DCLB.
Display Conditions
– This option only appears for Port-2 on a FrameSaver SLV 9128-II,
when Port Use is set to Synchronous Data.
Disable – Ignores the DCLB-actuate and DCLB-release for the port.
V.54 – DCLB-actuate and DCLB-release sequences that comply with the V.54 standard
for “inter-DCE signaling for point-to-point circuits” are recognized and will control the
initiation and termination of a DCLB (V.54 Loop 2) for the port.
ANSI_FT1 – DCLB-actuate and DCLB-release sequences that comply with either the
ANSI.403, Annex B standard for “in-band signaling for fractional T1 (FT1) channel
loopbacks” are recognized and will control the ini ti ation and termination of a DCLB for the
port.
V.54_&_ANSI – DCLB-actuate and DCLB-release sequences that comply with either the
ANSI or V.54 standard are recognized and will control the i nitiation and termination of a
DCLB for the port.

Table 4-7. Data Port Physical Interface Options (5 of 5)