Lucent Technologies DEFINITY Enterprise Communication Server Release 8.2 Administrators Guide

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
577 Data modules 
17
Busy Out
This option should be enabled for DTEs that are members of a hunt group and to 
allow “busy out” when DTE turns power off so that calls do not terminate on that 
DTE.
SPEEDS
Enter y to select operating speeds as follows:
Permit Mismatch
This option allows the EIA interface to operate at a rate different than that agreed 
to in the data module handshake. (The data module handshake is always the 
highest compatible rate as determined by the reported speed option of each data 
module.) Permit Mismatch eliminates the need to change the DTE/DLC speed 
every time a call is placed to/from an endpoint operating at a different speed. 
Valid entries Usage
y/n
Enter y to place the DLC port in a busied-out state once the DTE 
control lead to the DLC is dropped. 
Valid entries Usage
Low
Enter y to instruct the DLC to operate at a low speed from 0 to 
1800 bits per second (bps). Enter n if the KYBD Dialing field is 
y. 
300, 1200, 
2400, 4800, 
9600, or 
19200Enter y beside the desired operating speed. Enter n if the speed 
is not desired. The DLC can be any one of these speeds. The 
speed is matched for the duration of the call, from call setup to 
call takedown.
When multiple speeds are selected (select three or more, do not 
select just two speeds) and autoadjust is disabled, the DTE’s 
speed must be the highest selected speed. This is required 
because all feedback text is delivered to the DTE at the highest 
selected speed.
AutoadjustAppears when the KYBD Dialing field is y. Enter y which tells 
the DLC port to automatically adjust to the operating speed and 
parity of the DTE it is connected to. Enter n if this option is not 
desired. Autoadjust can be selected with any of the speeds 
selected in the previous step. Autoadjust allows the DLC port to 
determine the speed and parity of the DTE and then match itself 
to this speed. Autoadjust only applies to calls originated by the 
user through Keyboard Dialing. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
578 Data modules 
17
When this option is enabled, the DLC reports the highest optioned speed and all 
the lower speeds (or the previously selected autoadjust speed) during the 
handshake process.
!CAUTION:
Caution must be used when using this option to send information from a 
DTE/DCE that is transmitting data at higher rates than that of the far end. 
Sustained usage of this type transmission results in loss of data. Whenever 
this option is enabled, the DTE must match the highest speed selected for the 
associated DLC port.
This option is intended to be used by a DTE device operating locally at a higher 
baud rate than that of its far-end connection but transmitting relatively low 
amounts of data (for example, a user typing at a terminal). Also, this option may 
be selected whether Keyboard Dialing is selected.
NOTE:
The Low speed setting is not reported as an available speed when the Permit 
Mismatch field is 
y.
Dial Echoing
Appears when the KYBD Dialing field is 
y.
Disconnect Sequence
Appears when the KYBD Dialing field is 
y. Selects the sequence for a disconnect.
Valid entries Usage
y/n
Enter y to instruct the DLC to operate at the highest selected 
speed, which is a higher rate than the far-end data module.
Valid entries Usage
y/n
Enter y to echo characters back to the DTE. Dial echoing should 
be disabled when keyboard dialing is done by an intelligent 
device.
Valid entries Usage
long-break
A long-break is greater than 2 seconds.
two-breaksTwo-breaks is within 1 second. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
579 Data modules 
17
Answer Text
Appears when the KYBD Dialing field is 
y. This option enables text feedback that 
is normally delivered to the DTE when a call is answered or disconnected. The 
Answer Text option applies to DLC-generated text as well as text received from 
the system. If this option is disabled, the system still generates the text, but the 
DLC prevents it from being sent to the device.
This applies to the following messages:
— INCOMING CALL
— ANSWERED
— DISCONNECTED
— DISCONNECTED OTHER END
This option usually is disabled when the answering DTE is a computer or an 
intelligent device.
Parity
Appears when the KYBD Dialing field is 
y. Select the desired type of parity. The 
DLC generates the parities when call setup text is sent to the DTE. The DLC does 
not check the parity when receiving dialing characters. Parity has nothing to do 
with the far end; it is used by the DLC to terminal communications during call 
setup. Set to match the connected DTE.
Connected Indidation
Appears when the KYBD Dialing field is 
y. This option generates a 
“CONNECTED” message to the DTE when the connection has been established. 
If the KYBD Dialing field is 
n, the connected indication is provided by the DLC 
activating its EIA 232C control lead.
Valid entries Usage
y/n
Enter y to allow text messages to be delivered to the DTE when 
a call is being answered.
Valid entries Usage
even
odd
mark
space
Valid entries Usage
y/n
Enter y to select this option. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
580 Data modules 
17
DLC Option Settings
The following provides additional information on the option settings for DLCs 
when used with the following types of devices:
nPrinters
nNon-intelligent terminals
nData terminals and personal computers
nHost computers
nInformation Systems Network (ISN)
Printers
A DLC port with a companion ADU, when attached to a printer, usually 
terminates a data call. Therefore, in this connection, the printer is the endpoint 
device. The originating device may be attached to a DCP mode 2 data module 
(such as the MPDM) or the DLC. A Z3A ADU extends the range of the EIA 232C 
connection.
When a receive-only printer (or any printer that does not generate the Transmit 
Data and DTR leads) is used, the ADU must be powered from a small 
plug-mounted transformer (2012D, or equivalent) connected to pins 7 and 8 of the 
modular jack. (Refer to ADU User Manual for details.)
An ADU cannot be used if the printer has hardware flow control using the Clear 
To Send (CTS) lead. An ADU can be used, however, if the printer is using 
software flow control.
A printer connected to a DLC is usually assigned as a line. Ta b l e  7
 lists the option 
settings for printer connections. 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
581 Data modules 
17
Non-intelligent terminals
A non-intelligent terminal connected to the DLC usually is assigned as a line. 
Ta b l e  8
 lists the option settings for non-intelligent terminals.
Table 7. DLDM screen settings for printer connection 
Field on screen Option Comments
Speed Highest speed at 
which the Printer 
operatesSubject to distance 
limitations; Autoadjust not 
used
KYBD Dialing no
Busy Out yes If printer is member of Hunt 
Group
Permit Mismatch yes No, if printer is low speed
Parity -Don’t care
Dial Echoing - Don’t care
Disconnect 
Sequence- Don’t care
Answer Text - Don’t care
Connected 
Indication - Don’t care
Configuration no
Table 8. DLDM screen settings for connection to non-intelligent terminals
Field On screen Option Comments
Speed All speeds at which 
the terminal can 
operate; autoadjust Subject to distance limitations; 
Autoadjust when the KYBD 
Dialing field is 
y and the 
Terminal can generate an ASCII 
“return”
KYBD Dialing  yes
Busy Out no Yes, if terminal is member of a 
hunt group 
Permit Mismatch yes - 
Continued on next page 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
582 Data modules 
17
Data terminals and personal computers
An intelligent data terminal or a personal computer (PC) attached to a DLC can 
either originate or terminate a data call. A single ADU at the site of the originating 
device extends the distance signals can travel to the switch (the model ADU 
depends on the terminal connector). An analog telephone can be attached to this 
arrangement whenever an ADU uses the standard building wiring. Ta b l e  9
 lists the 
option settings used for data terminal and personal computer connections.Parity Same as DTE
Dial Echoing yes Only if the KYBD Dialing field 
is 
y 
Disconnect 
Sequence2  Depends on terminal 
Answer Text yes
Connected 
Indication -Don’t care
Configuration yes
Table 9. DLDM screen settings for connection to data terminal or personal 
computer
Field on screen Option Comments
Speed All speeds at which 
the Data Terminal 
or PC can operateSubject to distance limitations; 
Autoadjust not used 
KYBD Dialing  yes
Busy  Out no Yes, if device is accessed through 
a hunt group 
Permit Mismatch yes No, if device does not support 
XON/XOFF flow control
Parity Same as DTE
Continued on next page
Table 8. DLDM screen settings for connection to non-intelligent terminals
Field On screen Option Comments
Continued on next page 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
583 Data modules 
17
Host computers
A host computer may originate and terminate a data call. For this application, the 
number of DLCs required depends on the number of ports needed. An MADU can 
be used (instead of 8 ADUs) to complete the connection. Ta b l e  1 0
 lists option 
settings for a port that has a terminating connection to a host computer or an 
originating connection from a host computer.
NOTE:
If the KYBD Dialing field is n, the rest of the option settings are irrelevant. Dial Echoing no These devices can dial in the 
ASCII stream without human 
intervention
Disconnect 
SequenceLong  -
Answer Text no These devices may not want to 
see any text
Connected 
Indication -Don’t care
Configuration yes
Table 9. DLDM screen settings for connection to data terminal or personal 
computer
Field on screen Option Comments
Continued on next page 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
584 Data modules 
17
Screen 67. X.25 Adjunct Data Module Table 10. DLDM screen settings for terminating connection to host 
computer
Field on screen Option Comments
Speed All speeds at which 
the computer can 
operate Subject to distance limitations; 
Autoadjust not used 
KYBD Dialing  no
Busy Out -Don’t care
Permit Mismatch - Don’t care
Parity - Don’t care
Dial Echoing - Don’t care 
Disconnect 
Sequence- Don’t care
Answer Text - Don’t care 
Connected 
Indication - Don’t care
Configuration - Don’t care
  
change data-module 30                 DATA MODULE                       Page 2 of 2
   LAYER 2 PARAMETERS
            Number of Outstanding Frames (w): 4
                  Retry Attempt Counter (N2): 2
                             Frame Size (N1): 135
    Retransmission (T1) Timer (1/10 seconds): 10
              Idle (T4) Timer (1/10 seconds): 30
   LAYER 3 PARAMETERS
     Number of Outstanding Packets: 2
     Restart (T20) Timer (seconds): 8
       Reset (T22) Timer (seconds): 10 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
585 Data modules 
17
Number of Outstanding Frames (w)
Specifies layer 2 window size.
Retry Attempt Counter (N2)
Specifies the number of times to send one frame when this frame is not confirmed 
for a period of time.
Frame Size (N1)
Specifies the number of bytes in a frame.
Retransmission (T1) Timer (1/10 seconds)
The T1 timer is started at the beginning or the end of the transmission of a frame. 
At the end of this timer, retransmission of a frame is initiated according to the 
procedures for link set-up and disconnection or information transfer.
Idle (T4) Timer (1/10 seconds)
The T4 timer is a system parameter that represents the time a DTE allows without 
frames being exchanged on the data link.
Number of Outstanding Packets
Specifies the number of packets that can be sent without confirmation.
Valid entries Usage
1 - 7
If you enter 2, up to 2 frames can be sent without 
confirmation.
Valid entries Usage
0 - 7
Valid entries Usage
135
263
If the value is 135, there can be up to 1080 bits within a frame. 
This value is suitable for all adjuncts and for DCS.
Valid entries Usage
0 - 250
Valid entries Usage
0 - 250
Valid entries Usage
2 - 7 
						

							DEFINITY ECS Release 8.2
Administrator’s Guide  555-233-506  Issue 1
April 2000
Screen reference 
586 Data modules 
17
Restart (T20) Timer (seconds)
The T20 timer is a DTE time-limit started when DTE issues a restart indication 
and terminated when the restart request is received or confirmed.
Reset (T22) Timer (seconds)
The T22 timer is a DTE time-limit started when DTE issues a reset indication and 
terminated when the reset request is received or confirmed.
Screen 15-1. 7500 and World Class BRI Data Module 
XID
(Exchange identification) Used with 7500 and World Class BRI Data Modules. 
Used to identify layer 2 XID testing capability.
Fixed TEI
Used with 7500 and World Class BRI Data Modules. Used to indicate whether the 
endpoint has Fixed Terminal Equipment Identifier (TEI) capability. TEI identifies 
a unique access point within a service. For Fixed TEI stations, the TEI must be 
administered. Terminals with automatic TEI capability, the associated TEI is 
assigned by the system.
Valid entries Usage
0 - 500
Valid entries Usage
0 - 500
Valid entries Usage
y/n
Lucent recommends setting to n.
Valid entries Usage
y/n
Enter y to indicate the endpoint has Fixed Terminal Equipment 
Identifier (TEI) capability.
change data-module 30                                                   Page 2 of 2
                                 DATA MODULE
  BRI LINK/MAINTENANCE PARAMETERS
                   XID? y      Fixed TEI? n      TEI: ___
           MIM Support? y     Endpt Init? y     SPID: 300_____   MIM Mtce/Mgt? y