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20 221 02-FGB 101 327 Uen C - December 2006
4 Telephony Features (W25 only)
The Ericsson W25 provides analogue voice services via the telephony line
interface with high speech quality.
4.1 Line Interface
The POTS (FxS) interface can be configured, i.e. impedance, frequency,
cadence, levels etc.
DTMF dialing is supported.
4.1.1 Ringing Signal
It is possible to configure different ringing signals depending on the call
type.
The mapping and ring frequency are also configurable.
4.1.2 CLIP, CWI and Voice Mail Alert
The Ericsson W25 supports CLIP (Calling Line Identification Presentation)
service in both on-hook and off-hook state using the DTMF and FSK
protocols and is also supporting Bellcore standard.
It is possible to configure a country specific profile for the CLIP services.
The Ericsson W25 also supports the CWI (Call Waiting Indication) service
over the POTS interface. If there is a message in the user voice mailbox
this is indicated by the “Message Waiting” LED and by a special tone
played in the telephone.
The “Message Waiting” LED and tone is activated/deactivated by OTA
SMS messages.
4.1.3 Hook Flash
Hook flash functionality for the POTS interface is supported and
configurable.
4.2 UMTS/GSM Supplementary Services
The Ericsson W25 supports UMTS/GSM supplementary services as listed
below. In order to use the services, the operator network must support
them. Offered supplementary services can only be used with a DTMF
telephone connected to the unit.
• Calling Line Identification Presentation (CLIP)
• Calling Line Identification Restriction (CLIR)
• Call Forwarding Unconditional
• Call Forwarding on Mobile Subscriber Busy
• Call Forwarding on No Reply
• Call Forwarding on Mobile Subscriber Not Reachable
• Call Waiting