Paradyne COMSPHERE 3611 - Manual (Page 40)

Configuration Option Tables
4-13 3610-A2-GB48-50 September 1996
Table 4-4
(3 of 5)
TDM/MCMP Port Configuration Options *
PCC Buffer: Disab
Next Enab Disab Prev
Pseudo-Controlled Carrier Buffer. Intercepts the V.13 codes used by the V.13 protocol so they do not pass to the
receiving DTE. This configuration option is only valid when RxCarrSel is set to Cntrl. Not valid for MCMP.
For an asynchronous port configured for switched-carrier operation, set PCC Buffer to Enab.
For a synchronous port configured for switched-carrier operation, PCC Buffer can be disabled or enabled, depending on
whether the V.13 codes disrupt communication at the receiving DTE.
NOTE: Enabling this configuration option can corrupt the end-of-message for some synchronous protocols.
Enab – Enables PCC Buffer to intercept V.13 codes.
Disab – Disables PCC Buffer.
Elast Stor: Disab
Next Enab Disab Prev
Elastic Store. Elastic Store hardware consists of a transmit buffer (register). Serial data from the extended circuit is
clocked into the DSU elastic store using a clock (on EIA-232 Pin 24 or V.35 Pins U and W) provided by the extended
circuit received clock lead (on Pin 17). The DSU uses its own system timing to clock data out of the buffer.
Elastic Store is reset on power-up, overflow, or after the RTS lead makes an Off-to-ON transition. After reset, the elastic
store can drift by
± ā 5 bits in TDM mode and
± ā 3 bits in MCMP mode before overflow occurs.
Enab – Use Enable if you have an extended network.
Disab – Use Disable if you do not have an extended network.
RTS/CTS Del: 0
Next Chang Prev
Request-To-Send to Clear-To-Send Delay. Allows for an additional delay between the time that RTS is turned ON and
CTS is turned ON. A delay is sometimes required for multiplexed applications operating in switched-carrier operation
with primary channel extended circuits. This configuration option must provide enough delay so that the last DSU in the
circuit has time to train and be ready to accept data before CTS is turned ON.
Chang – Set the RTS-to-CTS delay to the desired value, from 0 to 1040 milliseconds in 8 milliseconds increments.
Port speeds of 38.4 and higher can only use delays of up to 504 milliseconds.
DTR Alarm: Disab
Next Enab Disab Prev
Data Terminal Ready Alarm. Causes the DSU to report an alarm for the port if the port’s DTR lead is Off for more than
30 seconds. The front panel or async terminal displays DTR Alarm and reports the alarm to NMS.
Enab – If the port’s DTR lead turns Off for 30 seconds, the DSU reports an alarm.
Disab – Regardless how long the port’s DTR lead is Off, no alarm is reported.
* The menu paths for Port 1 through Port 6 are identical; each port is set separately. Ports 3 through 6 do not appear
when a 2-port TDM/Flex or 2-port MCMP/Flex is installed.