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Installation
Analog cordless 1-line/2-line accessory handset - CTM-A241SD/CTM-A242SD/CTM-C4101/
CTM-C4201
Handset registration
To register a cordless handset to an A2410/A2420/CTM-A2411/CTM-A2411-BATT/CTM-A2421/CTM-A2421-BATT
telephone base:
Place the cordless handset on the telephone base cradle. Handset registration happens automatically the first time a cordless
handset is placed on the telephone base. When the registration process completes, the MESSAGE WAITING LED flashes once
and you hear 3 rising beeps as confirmation. Each telephone base accommodates up to 4 cordless handsets or accessory Petite
phones. When the telephone base has already registered 4 cordless handsets or accessory Petite phones, one of the registered
cordless handsets or accessory Petite phones must be deregistered or registered to another telephone base before adding a new
cordless handset or accessory Petite phone.
To register a cordless handset to a CTM-A2411/CTM-A2411-BATT/CTM-A2421/CTM-A2421-BATT/CTM-A2510/
CTM-A2510-USB telephone base without placing it on the telephone base:
When the telephone base is idle, press 123 on the telephone base and then press HOLD. The MESSAGE WAITING LED on the
base turns on for about 90 seconds. Press 123 on the cordless handset and then press HOLD. The MESSAGE WAITING LED on
the handset turns on for 90 seconds. When the registration process completes, you hear 3 rising beeps as confirmation. When the
telephone base has already registered 4 cordless handsets or accessory Petite phones, one of the registered cordless handsets or
accessory Petite phones must be deregistered or registered to another telephone base before adding a new cordless handset or
accessory Petite phone.
Handset deregistration
When a registered cordless handset is idle, press *331734# and then press HOLD. You hear 3 rising beeps as confirmation when
the deregistration process completes.
Register a handset to another telephone base
Any CTM-A241SD/CTM-C4101 handset can register to any A2410/CTM-A2411/CTM-A2411-BATT/CTM-A2510/CTM-A2510-USB
telephone base. Any CTM-A242SD/CTM-C4201 handset can register to any A2421/CTM-A2421/CTM-A2421-BATT telephone
base.
Deregister the registered cordless handset from its base (see Handset deregistration above) and then register it to a new
telephone base (see Handset registration above).
Handset battery charging
The battery must be fully charged before using the cordless handset for the first time. The CHARGE LED turns on when the
cordless handset is charging on the telephone base, charging base or charging stand. The battery is fully charged after 16 hours
of continuous charging. For best performance, keep the cordless handset in the telephone base, charging base or charging stand
when not in use.
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