ACCULINK 317x E1 DSU/CSU
C-4
December 1996
3170-A2-GB20-20
Table C-2
(2 of 4)
Port Configuration Options
All Ones: Both
Next Disab DTR RTS Both Prev
Send All Ones on Data Port Not Ready. Specifies the conditions on the data port that determine when valid data is not
being sent from the DTE. When this condition is detected, all ones are sent to the network on the DS0 channels allocated
to the port.
Disab – Disables the monitoring of interchange circuits from the DTE connected to this port.
DTR – Monitors the DTE Ready interchange circuit CD (CCITT 108/1/2). When DTR is interrupted, all ones are sent to
the network.
RTS – Monitors the Request-to-Send interchange circuit CA (CCITT 105). When RTS is interrupted, all ones are sent to
the network.
Both – Monitors both DTR and RTS. If either is interrupted, all ones are sent to the network.
NOTE: For X.21 applications, set this configuration option to RTS or Disab.
Rcv RAI: Halt
Next None Halt Prev
Action on Network RAI Alarm. Specifies the action taken on this port when a Remote Alarm Indication (RAI) is received
on the network interface.
None – Makes the data port unaffected by RAIs received on the network interface.
Halt – Stops the transmission of data on the port and disables the data port when RAIs are received on the network
interface. When RAIs are received, all ones are sent on the Received Data interchange circuit BB (CCITT 104). The
Clear-to-Send interchange circuit CB (CCITT 106) is interrupted.
Tx Clock: Int
Next Int Ext Prev
Data Port Transmit Clock. Specifies whether the transmitted data for the port is clocked using an internal clock provided
by the E1 DSU/CSU (synchronized to the clock source specified by the clock source configuration options in the General
configuration option group) or an external clock provided by the DTE connected to the port. When an external clock is
used, it must be synchronized to the same clock source as the E1 DSU/CSU.
Int – Indicates the clock is provided internally by the E1 DSU/CSU on the TXC interchange circuit DB (CCITT 114).
Ext – Indicates the clock is provided externally by the DTE on the XTXC interchange circuit DA (CCITT 113). Use this
selection when either the primary or secondary clock source is set to this data port.
InvertTxC: Disab
Next Enab Disab Prev
Invert Transmit Clock. Specifies whether the clock supplied by the E1 DSU/CSU on the TXC interchange circuit DB
(CCITT 114) is phase inverted with respect to the Transmitted Data interchange circuit BA (CCITT 103). This
configuration option is useful when long cable lengths between the E1 DSU/CSU and the DTE are causing data errors.
Enab – Indicates TXC supplied by the E1 DSU/CSU on this port is phase inverted.
Disab – Indicates TXC supplied by the E1 DSU/CSU on this port is not phase inverted.
InvrtData: Disab
Next Enab Disab Prev
Invert Transmitted and Received Data. Specifies whether the port’s transmitted data and received data are logically
inverted before being transmitted or received. This configuration option is useful for applications where HDLC data is
being transported. Inverting the data ensures that the density requirements for the network Interface are met.
Enab – Indicates the transmitted data and received data for this port are inverted.
Disab – Indicates the transmitted data and received data for this port are not inverted.
