COMSPHERE 3600 Series Data Service Units
4-12 December 1996 3610-A2-GB46-60
Table 4-4
(3 of 6)
General Configuration Options
Circ Assur:Disab
Next Enab Disab Prev
Circuit Assurance. Controls the CTS lead in response to a data signal from the network. This configuration option is
ignored if rate adaption in ef
fect or RTS Cntrl is set to ON at other end. Used for single-port applications only. When
enabled, Diag Type should not be set to NonD (T
able 4-2) and rate adaption should not be in ef
fect.
A DDS Facility Alarm condition turns Off the CTS lead, regardless of the Circuit Assurance setting.
Enab – The DSU turns Off the CTS lead if the DSU receives control mode idle (CMI) from the network.
Disab – The CTS lead is not affected by the receipt of CMI.
Tst Pattern: Std
Next AT&T Std Prev
Test Pattern. Selects the test pattern generator and comparator used by the DSU in disruptive testing. This configuration
option only applies to aggregate tests.
AT&T – Must be selected by a 3600 Series DSU when exchanging test patterns with 2500, 2600, and 3500 Series
DSUs.
Std – The ITU standard 511-bit pattern; used with external test equipment.
RespondRDL: Disab
Next Enab Disab Prev
Respond to Remote Digital Loopback. Determines whether the DSU responds to a 2500 or V.54 Remote Loopback
request. Refer to the
Loopbacks
section in Chapter 3.
Enab – Performs a Digital Loopback.
Disab – Ignores the Loopback command.
LL by DTE: Disab
Next Enab Disab Prev
Local Loopback by DTE. Whenever this lead is ON, the Local Loopback overrides any other diagnostic tests run by the
network. Refer to the
Loopbacks
section in Chapter 3.
Enab – The DTE forces the DSU into Local Loopback when the signal on Pin 18 of the EIA-232-D/V.24 interface or Pin L
of the V.35 interface is turned ON. Local Loopback ends when the signal is dropped.
Disab – The DTE will not initiate Local Loopback in response to the signal.
RL by DTE: Disab
Next Enab Disab Prev
Remote Digital Loopback by DTE. For this configuration option, Link Configuration must be set to Pt-Pt (Table 4-3).
Refer to the
Loopbacks
section in Chapter 3.
Enab – The DTE forces the DSU to request a Remote Digital Loopback when the signal on Pin 21 of the EIA-232-D/V.24
interface or Pin N of the V.35 interface is turned ON. Remote Digital Loopback ends when the signal is dropped.
Disab – The DTE cannot initiate Remote Digital Loopback.
Bilat Lpbk: Disab
Next Enab Disab Prev
Bilateral Loopback. If this configuration option is enabled, a DTE Loopback occurs when a Digital Loopback occurs.
Refer to the
Loopbacks
section in Chapter 3.
Enab – When enabled, a Digital Loopback causes a DTE Loopback.
Disab – Disables Bilateral Loopback.
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