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12 Station Extensions - Software User’s Manual S IPLACE HS-50 12.2 GEM Interface Software Version SR.501.xx Edition 01/99 410 3RVVLEOHVHW WL QJV 7 5 HSO\ WLP HRXW When a primar y messa ge is se nt to th e ho…
User’s Manual SIPLACE HS-50 12 Station Extensions - Software
Software Version SR.501.xx Edition 01/99 12.2 GEM Interface
409
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The parameters illustrated in the figure below have been tested and are recommended.
They must be set as defaults in order to optimize transfer from the host computer to the line
computer.
NOTES
Changing the parameters has the following effects on the day-to-day operation of the
GEM interface:
When a timeout value or the TCP/IP port number is changed, the GEM link to the host com-
puter is briefly interrupted. The GEM software is closed down when the IP address or IP
screen is changed. The GEM software cannot be used until the station is switched on again.
12 Station Extensions - Software User’s Manual SIPLACE HS-50
12.2 GEM Interface Software Version SR.501.xx Edition 01/99
410
3RVVLEOHVHW WLQJV
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When a primary message is sent to the host computer, the station waits for up to the number
of seconds specified for T3 for the secondary message from the host computer.
Range of values: 1 - 120 seconds
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This parameter determines the waiting time between successive attempts to establish a con-
nection. This is only important if the station has been configured as the ACTIVE ENTITY.
Range of values: 1 - 240 seconds
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After sending the message "Connect.req" or "Linktest.req" to the host computer, the station
waits for up to the number of seconds specified for T6 for the "Connect.rsp" or "Linktest.rsp"
message. The TCP/IP link is then interrupted.
Range of values: 1 - 240 seconds
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Once the TCP/IP connection has been established, the station configured as the PASSIVE
ENTITY waits for up to the number of seconds specified for T7 for the "Select.req" message
from the host computer. The TCP/IP link is then interrupted. A successful exchange of "Se-
lect.req" and "Select.rsp" forms the basis for the conversion of the TCP/IP connection into an
HSMS connection.
Range of values: 1 - 240 seconds
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Reception of an individual HSMS message must take no longer than the number of seconds
specified for T8. Otherwise the TCP/IP link will be interrupted.
Range of values: 1 - 120 seconds
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After sending a TCP/IP connect command, a station which has been configured as an ACTIVE
ENTITY waits for up to the number of seconds specified for CE for a connection to be estab-
lished successfully or for a status message. After this time, it is assumed that the command
was not received correctly.
User’s Manual SIPLACE HS-50 12 Station Extensions - Software
Software Version SR.501.xx Edition 01/99 12.2 GEM Interface
411
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This parameter determines the waiting time between sending successive "Linktest.req" mes-
sages. These messages check that the HSMS connection is working correctly. If the value 0
has been entered for CA, no "Linktest.req" messages are sent.
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While a SECS-II connection is being established, the SDR component of the GEM interface
buffers all the messages to be sent to the host computer. If the SECS-II connection cannot be
established within the number of seconds specified for TG, these buffered messages will be
sent to the host computer. Otherwise they are rejected by the SDR component and have the
status F_DELV.
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The SDR component of the GEM interface tolerates the status that all internal buffers are full
and that the host is attempting to send further data packets for up to the number of seconds
specified for MS. The TCP/IP connection is then ended to prevent the network becoming over-
loaded.
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The SDR component of the GEM interface tolerates the status that data packets to be sent
are not received by the TCP/IP connection for up to the number of seconds specified for WS
seconds. The TCP/IP connection is then ended.
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IP address for the connection to the customer’s LAN
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IP screen address for the connection to the customer’s LAN
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TCP/IP port number for the GEM connection to the host computer