Datasheet

DS26514 4-Port T1/E1/J1 Transceiver

19-5856; Rev 4; 5/11 73 of 305

9.9.17 Framer Payload Loopbacks

The framer, payload, and remote loopbacks are controlled by RCR3.

Table 9-35. Register Related to Framer Payload Loopbacks

RECEIVE CONTROL

FRAMER 1

ADDRESSES

FUNCTION

Framer Loopback 083h Transmit data output from the framer is looped back to the receiver.

Payload Loopback 083h The 192-bit payload data is looped back to the transmitter.

Remote Loopback 083h Data recovered by the receiver is looped back to the transmitter.

Note: The addresses shown above are for Framer 1. Addresses for Framers 2 to 4 can be calculated using the following: Framer n = (Framer 1

address + (n - 1) x 200hex), where n = 2 to 4 for Framers 2 to 4.