Call Sign allows End Users to distinguish between incoming calls on the same line. You are provided with an Alternate Number (AN) to your existing Telephone Number. When the AN is dialled, the telephone connected to the line will ring with a different cadence to the normal ring tone. You can thus determine whom the call is for, or who the caller is, prior to answering it. | | 
For more information on any of these products please call 0845 456 5544 or email us. |
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