3Com OfficeConnect 3C892A, User Manual, Page: 89 / 130

Supplementary Voice Services
83
Calling Line
Identification Restriction
You can restrict presentation of your telephone number(s) on Caller ID devices,
either permanently or on a per-call basis. By default CLIR is disabled, meaning that
you are allowing your telephone number to be shown on a Caller ID display. If you
enable CLIR, you prevent the display of your telephone number on a Caller ID unit.
Permanent Configuration
To enable CLIR on a permanent basis, use the following handset commands from
a telephone connected to a phone port on the ISDN LAN modem.
Call By Call Configuration
To enable CLIR on a temporary, call-by-call basis, use the following handset
commands from a telephone connected to a phone port on the ISDN LAN
modem.
Malicious Call Identification (MCID)
MCID allows you to request the trace of malicious calls on a call-by-call basis. The
MCID function can be invoked at any time while a call is coming in by pressing
*39# on a handset connected to a phone port attached to the ISDN LAN modem.
Your telephone company switch must support MCID in order for you to use it.
Check with your telephone company.
Table 6
Permanent Configuration of CLIR
Press these
telephone keys
To do this
#8#1# Enable CLIR for the phone port to which the handset is
connected.
#8#0# Disable CLIR Waiting for the port to which the handset is
connected.
#8#*# Check if CLIR Waiting is enabled or disabled. A double tone
indicates this feature is enabled. A triple tone indicates this
feature is disabled.
Table 7
Call By Call Configuration of CLIR
Press these
telephone keys
To do this
**31# Enable CLIR for the call you are about to place on the phone port
to which the handset is connected.
##31# Disable CLIR for the port to which the handset is connected.
**#31# Check if CLIR is enabled or disabled. A double tone indicates this
feature is enabled. A triple tone indicates this feature is disabled.