Configuration Options
6-23
3610-A2-GB91-90
July 1999
Table 6-6
(1 of 8)
General Configuration Options
DTE Port: EIA232
Next EIA232 V.35 Prev
DTE Port. Selects the active DTE interface. The alternate port (with active outputs and clamped inputs) can
be used to monitor incoming data or for the aggregate switch port. (Refer to the AnswExtBU and AggSwitch
configuration options.)
EIA232 —
For the EIA-232-D connector, the effective shunt capacitance of the circuit measured at the
DSU, including the capacitance of the cable and the DTE, must not exceed 2500 picofarads.
Operation at speeds up to 64 kbps is dependent upon cable length, cable quality, and the local
environment.
V.35
—
For all available rates at distances up to 1000 feet.
RTS Cntrl: FrcOn or DTE
Next FrcOn DTE Prev
Request-to-Send Control. This configuration option determines how the DSU will function with respect to the
RTS lead. If set to FrcOn, the DSU internally forces the RTS lead to ON; if set to DTE, the DSU sends
control mode idle (CMI) whenever RTS is Off, and data mode idle (DMI) when RTS is ON.
For point-to-point configurations with nondisruptive diagnostics, or rate adaption, this configuration is forced
ON internally.
For multipoint tributaries performing nondisruptive or mixed diagnostics, rate adaption, or when configuration
option M-PtSymPrt is enabled, this configuration option should be set to DTE.
FrcOn —
(Model 3610) Factory-loaded control (FacC) DSU keeps the internal RTS ON continuously,
regardless of whether RTS at the DTE interface is ON or Off. Control DSUs with LPDA-2
enabled must have RTS Cntrl forced ON and CTC Cntrl set to =RTS.
DTE
—
(Model 3611) Factory-loaded tributary (FacT) DSU responds to RTS from the DTE.
CTS Cntrl: Std or =RTS
Next Std =RTS Prev
Clear-to-Send Control. Controls the behavior of the CTS lead.
Std
—
Factory-loaded control (FacC) and factory-loaded tributary (FacT). CTS is normally controlled
by the DTE’s RTS lead; however, the CTS lead can be affected by the response to abnormal
conditions such as no signal or test mode, as determined by the following configuration option
settings: RTS Cntrl, Circ Assur, and CTS Lead.
=RTS
—
This configuration option is required for a control DSU with LPDA enabled, or a tributary DSU
with LPDA enabled when in a front-end processor (FEP)-to-FEP configuration. RTS Control
must be forced on (RTS Cntrl is set to FrcOn). In point-to-point configurations where LPDA is
disabled and RTS Cntrl is forced ON, CTS Cntrl can also be forced ON if the DTE interfaces
require no delay between RTS Cntrl and CTS Cntrl (0 ms), but does not require an
RTS-to-CTS transition. If MUX Funct is set to TDM, MCMP, EBrdg, or CBrdg, CTS will not be
affected by network alarms.
Summary of Contents for COMSPHERE 3610
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Page 259: ...Pin Assignments F 11 3610 A2 GB91 90 July 1999 Figure F 8 EIA 232 D Crossover Cable 4951 035F...
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