COMSPHERE 3600 Series Data Service Units
4-14 December 1996 3610-A2-GB46-60
Table 4-4
(5 of 6)
General Configuration Options
AnswExtBU: Disab
Next Enab Disab Prev
Answer External Dial Backup. This configuration option is an aggregate switch on-demand feature that allows dial
backup for a point-to-point 3600 Series DSU using an External dial backup unit (DBU). The 3600 Series DSU is forced to
switch the aggregate data to the alternate DTE connector which is an interface connected to the aggregate data path
rather than to the DTE (alternate Port 1, either the V.35 or EIA-232 interface). Control of the aggregate switch can be
automated in several ways.
When the remote site is to initiate a dial backup session, enable AnswExtBU. With this type of automated control, the
DSU monitors the data terminal ready (DTR) lead on the aggregate port. When the External DBU has established a call
and has turned ON the data set ready (DSR) lead, the DSU switches the aggregate data from the DDS line to the
aggregate port via a crossover cable between the External DBU and the DSU. When the External DBU drops the call
and the DTR signal turns Off, the DSU switches the aggregate data back to the DDS line. Note that when you select
enable, the front panel Backup (Bkup) and Drop Backup (DrBU) and NMS Standby Facility commands are ignored.
When a dial backup session is initiated at the local site, disable AnswExtBU so that the DSU controls the DSR lead on
the aggregate port. By selecting the Backup command from the front panel (Bkup) or Standby Facility command from the
NMS, data is routed from the External
DBU through the network interface (NetIntf) switch to the DTE. As a result, the
DSR signal turns ON, which then turns on the DTR signal at the External DBU. If configured for DTR call-control, the
External
DBU places the call. Data switches back to the DDS line when the front panel Drop Backup (DrBU) or NMS
Standby Facility command is issued. This turns the DSR signal Of
f on the alternate Port 1 and, if the
External
DBU is
configured correctly, the DBU drops the dial connection.
NOTE: If an Internal DBM is installed and active or NetIntf is not set to AggSw (Table 4-1), this configuration option will
not appear
.
Enab – Activates the DSU to automatically switch the aggregate data stream to the alternate Port 1 when the DTR
signal turns ON. The DSU configuration option NetIntf must be set to AggSw.
Disab – Allows the local DSU to control the call initiation and disconnect on an external
DBU via the DSU’s front panel
or the NMS. The DSU configuration option NetIntf must be set to Forc (Table 4-1).
RLSD in MCMP: No
Next Yes No Prev
Receive Line Signal Detector in Multichannel Multipoint. Defines whether switched RLSD is required for shared backup
with MCMP to support RLSD detection. This configuration option only appears when an ISDN or Switched 56 DBM is
installed.
Yes – Switched RLSD is required.
No – Switched RLSD is not required.
Async→Sync: Disab
Next Enab Disab Prev
Asynchronous-to-Synchronous Conversion. Sets Port 1 of the DSU DTE interface for asynchronous or synchronous
operation. This configuration option only appears when the Single-Port Async/Sync feature is installed (App Modul ID
displays ASPEN or SEQU).
Enab – Configures Port 1 as asynchronous (asynchronous-to-synchronous conversion takes place).
Disab – Configures Port 1 as synchronous.
AsyncBit/Char: 8
Next 6 7 8 9 10 Prev
Asynchronous Bits per Character. Specifies the length of a character, including the parity bit but excluding the start and
stop bits. This configuration option only appears when the Single-Port Async/Sync feature is installed and the
Async→Sync configuration option is enabled.
6 to 10 – Selects the asynchronous bits per character. When Stop Bits is set to 2, 10 will not appear.
To Next Page
Loading...
