MagTek MCP - Manual (Page 45)

Section 4. Protocol
39
Error Recovery During Chain
I (0,0)-C
ÆÆÆ
(Rule 4.1)
ÅÅÅ R (1)
(Rule 4.7)
I (1,0)-C ÆXÆ (Rule 4.1)
(bwt)
R (0)-poll
ÆÆÆ
(Rule 5.2)
ÅÅÅ R (1)
(Rule 5.4a)
I (1,0)-C
ÆÆÆ
(Rule 5.5b)
ÅÅÅ R (0)
(Rule 4.7)
I (0,0)-C
ÆÆÆ
(Rule 4.1)
ÅÅÅ R (1) (Rule 4.7)
I (1,0)
ÆÆÆ
(Rule 4.1)
ÅÅÅ R (0) (Rule 4.7)
Service Indications
Resend Indication on I-frame – indication ignored
(connection was established and some data may have been exchanged)
I (0,0)
ÆEÆ (Rule 4.1)
ÅÅÅ S (resend ind)
(Rule 6.1)
(bwt) (Rule 6.2a)
R (0)-poll
ÆÆÆ
(Rule 5.2)
ÅÅÅ R (0)
(Rule 5.4a)
I (0,0)
ÆÆÆ
(Rule 5.5b)
ÅÅÅ R (1)
(Rule 4.7)
(data is transferred successfully according to Rule 4.8)
Resend Indication on I-frame – indication processed
(connection was established and some data may have been exchanged)
I (0,0)
ÆEÆ (Rule 4.1)
ÅÅÅ S (resend ind)
(Rule 6.1)
I (0,0)
ÆÆÆ
(Rule 6.2b and Rule 5.3)
ÅÅÅ R (1)
(Rule 4.7)
(data is transferred successfully according to Rule 4.8)
Resend Indication on S-frame – indication ignored
S (echo req) ÆEÆ (Rule 6.1)
ÅÅÅ S (resend ind)
(Rule 6.1)
(bwt) (Rule 6.3a)
S (echo req)
ÆÆÆ
(Rule 1.4a)
ÅÅÅ S (echo rsp) (Rule 1.2)