Cisco ATA188-I2-A Administration Guide - Page 169

Example 7-3, Fax Pass-through Mode, T38 Fax Relay Mode, Cisco Fax Relay

Page 169 highlights

Chapter 7 Configuring and Debugging Fax Services Debugging the Cisco ATA 186/188 Fax Services Analysis • Both sides initially use G.723. • switches to G.711µ-law using a dynamic payload type. • NSE signaling packets are sent from . • An optional NE signaling packet is sent from . • switches to G.711µ-law using a dynamic payload type. Note EVT 193 may not appear for some fax transmission. Example 7-3 Fax Pass-through Mode ---------- FAX Summary 1 ---------[ 37]2.53> Codec G723 [ 41]3.200> Codec G723 [ 136]2.53> Codec G711u/D [ 137]2.53> NSE PT 100, EVT 192: Up-Speed, CED tone Detected [ 140]3.200> Codec G711u/D Analysis • Both sides initially use G.723. • switches to G.711µ-law using a dynamic payload type. • NSE signaling packets are sent from . • switches to G.711µ-law using a dynamic payload type. Example 7-4 T38 Fax Relay Mode ---------- FAX Summary 1 ---------[ 15]3.99> Codec G711u [ 486]2.53> Codec G711u [ 1277]2.53> Codec T38 [ 1278]3.99> Codec T38 Analysis • Both sides initially use G.711µ-law. • Both sides switch to T.38 Example 7-5 Cisco Fax Relay ---------- FAX Summary 1 ---------[ 8]3.99> Codec G711u [ 248]2.53> Codec G711u [ 798]3.99> NSE PT 96, Cisco Fax Relay [ 799]2.53> NSE PT 97, EVT 192: Up-Speed, CED tone Detected [ 800]3.99> NSE PT 97, Cisco Fax Relay ACK [ 801]3.99> Codec C_FxRly [ 803]2.53> NSE PT 96, EVT 192: Up-Speed, CED tone Detected [ 804]3.99> NSE PT 97, Cisco Fax Relay ACK [ 805]2.53> Codec C_FxRly OL-4804-01 Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator's Guide for H.323 (version 3.0) 7-17

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7-17
Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for H.323 (version 3.0)
OL-4804-01
Chapter 7
Configuring and Debugging Fax Services
Debugging the Cisco ATA 186/188 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.
Note
EVT 193 may not appear for some fax transmission.
Example 7-3
Fax Pass-through Mode
---------- 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
T38 Fax Relay Mode
---------- 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
Cisco Fax Relay
---------- FAX Summary 1 ----------
[
8]<2.53=>3.99> Codec G711u
[
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