User's Manual

348 Module - eESPA - sample

Table 18

(cont’d.)

MASTER (address 1) SLAVE (address 2)

EOT

2ENQ (polling)

Master has data to be transferred (Slave is not ready to receive data)

1ENQ (I want to send something)

2ENQ (Destination address)

1NAK (Transmission error)

EOT

1ENQ

2ENQ

1NAK

EOT

Slave has data to be transferred

2ENQ

Nortel Communication Server 1000

DECT Messenger Installation and Commissioning — Book 1

NN43120-301 02.01 4 June 2010