COMSPHERE 3600 Series Data Service Units
4-4
December 1996
3610-A2-GB46-60
Table 4-1
(3 of 3)
DSU Configuration Options
64KScramblng: Off
Next On Off Prev
64 kbps Scrambling. Controls the data scrambler used with 64 kbps Clear Channel operation. Data scrambling
suppresses the possible simulation of network control codes by application data. This configuration option appears when
Rate(Kbps) is set to 64CC, and must be the same at both the local and remote DSUs.
On – Enables data scrambling.
Off – Disables data scrambling.
64KLatchLpbk: On
Next On Off Prev
64 kbps Latching Loopback. Controls the DSU’s response to the network latching loopback sequence on 64
kbps Clear
Channel operation. This configuration option appears when Rate(Kbps) is set to 64CC.
On – DSU responds to the network latching loopback command. ON is required for compliance with AT&T Technical
Reference 62310 – 1993.
Off – DSU ignores the network latching loopback command.
NetIntf: Disab
Next AggSw Forc Disab Prev
Network Interface. When set to AggSw, the DSU bridges aggregate data over the alternate Port 1. If the DTE Port
configuration option is set to EIA-232 (Table 4-4), the aggregate data is bridged to the V.35 interface. If the DTE Port
configuration option is set to V.35, the aggregate data is bridged to the EIA-232 interface. Not valid with digital bridging.
AggSw – Enable for aggregate switch backup. When Answer External Dial Backup is disabled (Table 4-4), the DSR
signal is sent to the external dial backup unit. Data can be sent over alternate Port 1 and the DDS line simultaneously.
An installed DBM must be disabled to select this configuration option.
Forc – Forces Aggregate Switching to ON. When Answer External Dial Backup is enabled (Table 4-4), the alternate
Port 1 is active and the DDS line is inactive.
Disab – Alternate Port 1 not in use.
NetI Timing: NetI
Next Int NetI Prt1 Prt 2 Prt3 Prt4 Prt5 Prt6 Prev
Network Interface Switch Timing.
If NetIntf is set to AggSw or Forc, this configuration option determines where timing is
obtained. Not valid with EBrdg.
Int – Timing is generated internally by the DSU.
NetI – Timing is taken from the network.
Prt1 to Prt6 – Timing is taken from the port. Not available in MCMP mode. Ports 2 through 6 are available for TDM
mode, if installed.
V.54 Lpbk: Disab
Next Enab Disab Prev
V.54 Loopback. Enables V.54 Loopback operation. This configuration option is supported for point-to-point
configurations. The V.54 sequences are generated and detected on Port 1. Refer to the
Remote Digital Loopback
section in Chapter 3.
Enab – Enable if the DTE generates V.54 loopback sequences or if the 3600 Series DSU is communicating with a
non-3600 Series DSU that supports V.54
signaling.
Disab – Disable if the DTE does not support V.54 signaling or other DSUs do not support V.54 signaling.
