DS1000/2000 Correspondence Course
System Programming
154 ◆ DS1000/2000 Workbook NEC America
Programming Guide
Step-by-step guide for setting up Central
Office Calls, Placing (Sheet 1 of 4)
Step 1: Check to be sure each trunk’s circuit type and loop length setting matches the con-
nected trunk circuit.
• In Program 1001 - Trunk Circuit Type enter the
correct circuit type for each trunk (51 = loop start
DTMF, 52 = loop start DP).
• In Program 0402 - Codec Digitizing Method be
sure to always set this option to 0 (µ-law com-
panding enabled). Do not set this option to 1.
• In Program 1001 - Loop Length use this option to
compensate for a trunk’s loop length. Use the
short option (1) only when the system is very
close to the central office or behind a PBX. Use
the long option (2) for normal installations.
Step 2: Review System Timers, Trunks in the DS1000/2000 Software Manual for compatibility
with the connected telco or PBX/Centrex.
Step 3: Are connected trunks DTMF or Dial Pulse (DP)?
• In Program 0402 - Manual DTMF Tone On set
the DTMF on duration for compatibility with the
connected telco or PBX.
• Program 0402 - Manual DTMF Tone Off set the
DTMF off duration for compatibility with the
connected telco or PBX.
• In Program 0402 - DP Make Timer set the DP
make (on) interval for compatibility with the con-
nected telco or PBX.
• In Program 0402 - DP Break Timer set the DP
break (off) interval for compatibility with the
connected telco or PBX.
• In Program 0402 - DP Interdigit Timer set the DP
interdigit (time between digits) interval for com-
patibility with the connected telco or PBX.
Step 4: For Direct Trunk Access, should trunk extension numbers be left at their default set-
ting (e.g., 401-448 in DS2000 or 401-406 in DS1000).
• In Program 0504 - Trunk Port Extension Num-
bers, leave the trunk extension numbers at their
default settings (401-448 in DS2000 or 401-406
in DS1000).
DTMF
DP
If yes
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