Specifications

Installation and Operation Manual Chapter 1 Introduction
IPmux-24 Ver. 1.5 Functional Description 1-13
The UDP Source Port value calculation depends on the selected TDMoIP version
(1 or 2):
• TDMoIP version 2: The UDP Source Port value equals 0x2000 + Destination
Bundle Number, it is always greater than 8192.
• TDMoIP version 1:
 During normal operation the UDP Source Port value equals Destination
Bundle Number + 1 (for example, for bundle 1 the UDP Source Port
equals 2). The allowed range for the UDP Source Port values in the
normal state is from 0 to 8191.
 If a bundle is in the local fail state, the MSB of the UDP Source Port is set
to 1 to indicate the local fail state to the remote equipment. In this case
the UDP Source Port value equals 0x8000 + Destination Bundle Number +
1
. The UDP Source Port value in the local fail state is always greater than
32768.
VLAN Support
VLAN, according to IEEE 802.1p&Q, adds four bytes to the MAC layer of the
Ethernet frame. The user can set the contents of these bytes, MAC layer priority
and VLAN ID. In this mode, only VLAN format frames are sent and received by
IPmux-24.
Figure 1-8 shows the VLAN tag format.
802.1D Tag Protocol Type
81 00
user_priority
CFI = 0
VID
8654 18 1
Priority
VLAN ID
Figure 1-8. VLAN Tag Format (802.1p&Q)
UDP Support
Table 1-2. UDP Ports Definition
Field Length (Bits) Field Description Value Function
2 bytes UDP Source Port 2–497d* Destination timeslots bundle
2 bytes UDP Destination Port 2142d Standard TDMoIP UDP port
* The MSB of this field can be either 1 or 0 for inband end-to-end proprietary
signaling.
The UDP Source Port field is used for destination timeslots bundle indication.
For more information about VLAN tagging, refer to IEEE standard 802.1p&Q.
Note
Note