Single Number Reach for Analog Phones
The SNR feature allows you to answer incoming calls to your analog phones on preconfigured alternate phones (external phones), such as desktop or mobile phones.
When an incoming call is directed to your analog phone, all the alternate phones configured in the SNR ring simultaneously (configurable). When you answer the call on one of the assigned numbers, all the other assigned numbers stop ringing (configurable).
You can pick up active calls on any of the assigned external phones, enabling callers to dial a single number (extension number) to reach you.
For SNR, the incoming call is regarded as a normal call. The only difference lies in what controls the analog endpoints: the Cisco Unified CME or the Cisco Unified CM.
In Cisco Unified CME, only one external phone can be configured but that external phone can also be a Cisco Unified CME extension (also called an internal phone).
When the assigned external phone answers the call, the internal phone is put on hold. Once you pick up the internal phone, the external phone is disconnected and the call continues on the internal phone. However, once the call is answered on the internal phone, the call cannot be switched to the external phone.
In Cisco Unified CM, only external phones can be configured as an SNR phone for your analog phones.
When you answer a call using an external phone, the internal phone goes into the remote multiline state. When the external phone disconnects from the call, the Cisco Unified CM puts the call on hold for a configured period of time. During this period, the call can be picked up on the internal phone by going offhook. In case the internal phone does not go offhook before the end of the configured time is reached, the internal phone is also disconnected.
When you answer a call using the Cisco Unified CM extension (internal phone), all the external phones are disconnected and are put in the idle state. However, once the call is answered on the internal phone, the call cannot be switched to the external phone.
If you have several phone numbers, you can setup all the numbers into your analog phones.
Note The SNR feature is required for users who have analog phones on their desks but would like to get calls simultaneously on their predefined mobile or alternate telephone number.