Cisco ATA186-I2 Administrator's Manual page 169

Chapter 7 Configuring and Debugging Fax Services
Analysis
• Both sides initially use G.723.
<2.116> switches to G.711µ-law using a dynamic payload type.
•
NSE signaling packets are sent from <2.116>.
•
An optional NE signaling packet is sent from <2.213>.
•
<2.113> switches to G.711µ-law using a dynamic payload type.
•
EVT 193 may not appear for some fax transmission.
Note
Example 7-3
---------- FAX Summary 1 ----------
[ 37]<3.200=>2.53> Codec G723
[ 41]<2.53=>3.200> Codec G723
[ 136]<3.200=>2.53> Codec G711u/D
[ 137]<3.200=>2.53> NSE PT 100, EVT 192: Up-Speed, CED tone Detected
[ 140]<2.53=>3.200> Codec G711u/D
Analysis
Both sides initially use G.723.
•
<3.200> switches to G.711µ-law using a dynamic payload type.
•
NSE signaling packets are sent from <3.200>.
•
<2.53> switches to G.711µ-law using a dynamic payload type.
•
Example 7-4
---------- FAX Summary 1 ----------
[ 15]<2.53=>3.99> Codec G711u
[ 486]<3.99=>2.53> Codec G711u
[ 1277]<3.99=>2.53> Codec T38
[ 1278]<2.53=>3.99> Codec T38
Analysis
Both sides initially use G.711µ-law.
•
Both sides switch to T.38
•
Example 7-5
---------- FAX Summary 1 ----------
[
[ 248]<3.99=>2.53> Codec G711u
[ 798]<2.53=>3.99> NSE PT 96, Cisco Fax Relay
[ 799]<3.99=>2.53> NSE PT 97, EVT 192: Up-Speed, CED tone Detected
[ 800]<2.53=>3.99> NSE PT 97, Cisco Fax Relay ACK
[ 801]<2.53=>3.99> Codec C_FxRly
[ 803]<3.99=>2.53> NSE PT 96, EVT 192: Up-Speed, CED tone Detected
[ 804]<2.53=>3.99> NSE PT 97, Cisco Fax Relay ACK
[ 805]<3.99=>2.53> Codec C_FxRly
OL-4804-01
Fax Pass-through Mode
T38 Fax Relay Mode
Cisco Fax Relay
8]<2.53=>3.99> Codec G711u
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0)
Debugging the Cisco ATA 186/188 Fax Services
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