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7.4 TROUBLESHOOTING GUIDE
174
Installation Manual
Unable to call Operator 1
Improper setting of the 
operator extension number.
Adjust the operator extension 
number to that of the connected 
PBX (see "Operator’s 
Extension" in Table B-12 i
B5.1 Automated Attendant 
Parameters).
Connected terminal (RS-
232C port) does not 
operate.
Improper connection.
Improper setting of the RS-
232C parameters.
Be sure you are using a null 
modem cable (see 2.8 
TERMINAL CONNECTION).
The terminal and VPS should 
have the same parameter 
settings for Baud Rate, Word 
Bit Length, Parity and Stop Bit 
Length (see B7.1 RS-232C 
Parameters).
 
Unable to reconnect when 
the line is busy.
Improper setting of the busy 
signal reconnection procedure.
Re-adjust the busy signal 
reconnection procedure to that 
of the connected PBX (see 
"Reconnect Sequence on 
Busy" in Table B-42 in B7.3 
PBX Interface Parameters)
.
Unable to make a no-
response reconnection.
Improper setting of the no-
response reconnection 
procedure.
Re-adjust the no-response 
reconnection procedure to that 
of the connected PBX (see 
"Reconnect Sequence on No 
Answer" in Table B-42 B7.3 
PBX Interface Parameters)
.
Unable to generate a call 
waiting tone from the VPS.
Improper setting of sequence.
Adjust the Call Waiting 
sequence to that of the 
connected PBX (see "Call 
Waiting Sequence" in Table B-
42 in B7.
3 PBX Interface 
Parameters).
Unable to make Intercom 
Paging to groups.
Improper setting of the 
Intercom Paging access code.
Adjust the Intercom Paging 
access code to that of the 
connected PBX (see "Paging 
Code for Group 1-16" and 
"Paging Code for All Groups" in 
Table B-34 in B6.7 Other 
Parameters).
Table 7-5 
PROBLEM
PROBABLE CAUSE
POSSIBLE SOLUTION