Siemens TC12 Installation, Commissioning And Maintenance Handbook page 127

3.3.3.87 Remote Handset Mode
GRH = { 0 or 1 } (0)
Comment:
The following commands are for engineering diagnostic use only and would not
normally be required for maintenance operations. Refer to Siemens Engineering
for further information.
3.3.3.88 Scheduler Dummy Routine Control (GDC, KDC)
3.3.3.89 Engineering Display Base (GEB, KEB)
3.3.3.90 Display Engineering data Items (GEG, KEG)
3.3.3.91 Display Engineering RAM data (GER, KER)
3.3.3.92 Display Processor Free Time (GFE, KFE)
3.3.3.93 Display Power-Up Data (GPU, KPU)
3.3.3.94 Run Time Monitor (GRT, KRT)
3.3.3.95 Display Soft Error Count (GSC, KSC)
The following commands are for OTU development test purposes only.
3.3.3.96 Message Count (Bit Error Test) (GMC)
666/HE/43100/000
TC12 Installation, Commissioning & Maintenance Handbook
Customises the Remote Handset facility. Not normally changed
from its default of zero. The value of '1' disables the delay used by
the OTU to help recognise the response to the new handset
command entered.
Engineering and Special Function Commands
OTU development test commands
Page 117 Issue 10