E1/T1
A European format for digital transmission. E1 supports signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling), versus the T1, which carries signals at 1.544 Mbps (24 channels at 64Kbps).
IP Phone Yealink SIP-T28P has all the advantages of other devices from Yealinkâs product range: convenient handset, the optimal angle of the screen, high-definition audio that meets IEEE1329 standards, ten additional programmable keys to automate most common actions and LED status indication of contacts whose numbers are set to speed dial.
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