Siemens Simplified: Increasing DIMEN Allocation; Siemens Hicom 300

Monday May 14th, 2012

Last week one of our readers asked an important question regarding DIMSU allocation in their HiPath 4000 system.  A similar threshold exists on a parameter know as DIMEN in Hicom 300 phone systems.  Following is a list of guidelines that will help you interpret the fields within DIMEN in order to determine if you have reached a threshold and need to increase DIMEN allocation.


When making software changes in the Siemens Hicom 300 PBX system, there is a possibility of reaching a threshold on a parameter, better known as a DIMEN.  When a DIMEN allocation has been reached then the system will not allow you to continue on until the DIMEN has been increased.

When DIMENs have to be increased, the administrator of the Hicom 300 system will need to be notified.  Each DIMEN must be tested, before it is increased; the testing allows you to check memory capacity.

The following guidelines will help you interpret the fields when displaying DIMEN:

  • The display will show how much memory is allocated (ALLOC), the maximum amount that has been used in the system (MAXUSED) and how much is currently used (USED)
  • The display will show the system maximum (SYSMAX) and the recommended maximum (RECMAX)
  • The difference between ALLOC and USED values shows the amount of memory available for adding devices and features.
  • The difference between ALLOC and MAXUSED values shows how much of the allocated memory has never been used.
  • If the USED value equals the ALLOC value, any configuration change that affects this parameter will fail.  You will need to contact the next level of support for assistance.


ACDLOGO:  Number of agents logged on simultaneously

ACDPRIM:  Number of primary ACD agent positions

ACDAG:  Number of ACD agents


AULEXT:  Number of call-forwarding extensions

LODEN:  Number of logical devices

KEYSET:  Number of Key systems and phantom devices

NAME:  Number of subscriber names for display at voice terminals

OPTIOPT:  Number of Optiset optional devices; i.e., key expansions

OPTISET:  Number of Optiset devices

ORG:  Number of organization units or departments associated with subscribers (PERSI)

PID:  Number of personal ID numbers (pinm)

STN:  Number of stations (individual call numbers)

DIGADD:  Number of add-on devices for digital telephones (phone adapters)

DYAD:  Number of DYAD phones, including phantom devices

EXTBLK:  Number of directory answer blocks (1block-100 extensions)

RP120:  Number of RP120, RP312 and RP612 phones

RP240:  Number of RP240, RP624 and RP612R phones

RP400PL:  Number of RP400, and RP624K phones

There are some DIMENS that when the allocated number is reached and it needs to be increased that will also relate to a DIMEN in the LTG partitions.  In this situation, both DIMENS will need to be tested and increased.

Below is a list of the common LTG DIMENS:

DIGLTG:  Number of digital telephones for specified LTG (Release 9006.1)

DIG2LTG:  Number of digital devices and LEDs per LTG

DIGILTG:  Number of digital telephones for specified LTG (Release 9006.2)

KSETLTG:  Number of key systems and phantom devices for specified LTG

OPTILTG:  Number of Optiset menus and optional devices per LTG

OPTSTLTG:  Number of Optiset devices and LEDS per LTG (which ever value is greater)

Feel free to give us a call for more details at (866) 536-7305.

Siemens Simplified Tech Tips are provided for educational purposes only. Telizent Communications will not be liable for any errors or inaccuracies, or any actions taken in reliance thereon. Telizent Communications expressly disclaims all warranties – expressed or implied – as to the accuracy of any of the content provided, or as to the fitness of this information for any purpose.  If you are not trained on the systems you are administering or are not comfortable performing the steps described in the Siemens Simplified Tech Tips you should contact Telizent for trained technical support.

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