Huawei eSpace IAD - Page 40

eSpace IAD
Troubleshooting
2 Analyzing and Rectifying Faults
Issue 02 (2012-02-29)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
35
Step 4 Check the fax configuration.

If SIP is used, run the display sip send-capability command to view the fax priority
configuration.

If MGCP is used, run the display mgcp soft-parameter command to view the MGCP
software parameters:
TERMINAL#display mgcp soft-parameter
MGC-TYPE REGISTER-MODE CW-TONE-MODE
SoftX Wildcard mgc
========================================================
FAX-MODE HOLD-FLAG CHARGE CONTROL
T38v3 Off on
========================================================
DUAL-TONE-DELAY
200 ms
The faxing modes supported in the MGCP service are as follows:

711v2: Transfer mode (transparent)

t38v2: T.38 mode

t38v3: T.38 or transfer mode
Step 5 Verify that bearer network quality is good. For network quality definition, see Table 2-1.
Table 2-1 Network quality definition
Network Status
Packet Loss Ratio
Network Delay
(ms)
Jitter (ms)
Good
≤ 0.1%
≤ 40
≤ 10
Poor
≤ 1%
≤ 100
≤ 20
Bad
≤ 5%
≤ 400
≤ 60

If the network quality is poor, change the faxing mode. For relationships between
fax/modem service performance and network quality, see Table 2-2Table 2-3.
Table 2-2 Fax/Modem service performance and network quality
Service Type
Performance
in a Good
Network
Performance
in a Poor
Network
Performance
in a Bad
Network
Modem
Transfer
Proved
Failed
Failed
Fax
Transfer
Proved
Failed
Failed
T.38
Proved
Proved
Failed