eSpace 6805 IP Phone
Administrator Guide
6 Appendix
Issue 01 (2014-01-06)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
138
Figure 6-58
Data link layer of the SIP protocol
Network layer
The third layer in the protocol layer description window is the network layer, which
contains the source IP address (
Source
), destination IP address (
Destination
), packet
length (
Total length
), and checksum (
Header checksum
), as shown in
Figure 6-59
Network layer of the SIP protocol
At the network layer, check whether:
−
The source IP address and destination address are correct.
−
The length of a packet exceeds the maximum length allowed by a certain device.
Transport control layer
The fourth layer in the protocol layer description window is the transport control layer,
which contains
Source port
,
Destination port
, packet length (
Length
), and
Checksum
,
as shown in
