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12 Station Extensions - Software User Manual SIPLACE S-23 HM 12.2 GEM Interface Software Version SR.405.xx 05/99 Issue 398 Possible setti ngs: 12 T3: Reply timeout 12 When a pr imary m essage is sent t o the ho st co mpu…

User Manual SIPLACE S-23 HM 12 Station Extensions - Software

Software Version SR.405.xx 05/99 Issue 12.2 GEM Interface

397

12.2.2.3 Setting the GEM/SECS Parameters

CAUTION

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 com-

puter. 12

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 computer

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

Fig. 12.2 - 3 "GEM/SECS parameters" window

12 Station Extensions - Software User Manual SIPLACE S-23 HM

12.2 GEM Interface Software Version SR.405.xx 05/99 Issue

398

Possible settings: 12

T3: Reply timeout 12

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 12

T5: Connect separation timeout 12

This parameter determines the waiting time between successive attempts to establish a connec-

tion. This is only important if the station has been configured as the ACTIVE ENTITY.

Range of values: 1 - 240 seconds 12

T6: Control transaction timeout 12

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 12

T7: NOT SELECTED timeout 12

Once the TCP/IP connection has been established, the station configured as the PASSIVE EN-

TITY 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 "Select.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 12

T8: Network intercharacter timeout 12

Reception of an individual HSMS message must take no longer than the number of seconds spec-

ified for T8. Otherwise the TCP/IP link will be interrupted.

Range of values: 1 - 120 seconds 12

CE: Connection Establishment Timeout 12

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 established

successfully or for a status message. After this time, it is assumed that the command was not re-

ceived correctly. 12

User Manual SIPLACE S-23 HM 12 Station Extensions - Software

Software Version SR.405.xx 05/99 Issue 12.2 GEM Interface

399

CA: Circuit Assurance 12

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. 12

TG: Grace period 12

While a SECS-II connection is being established, the SDR component of the GEM interface buff-

ers all the messages to be sent to the host computer. If the SECS-II connection cannot be estab-

lished 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.12

MS: Memory Stall 12

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 overloaded. 12

WS: Write Stall 12

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. 12

IP address: 12

IP address for the connection to the customer’s LAN 12

IP screen: 12

IP screen address for the connection to the customer’s LAN 12

Port: 12

TCP/IP port number for the GEM connection to the host computer 12