Serial Interface Overview; Layer 1 T1 Port With Two Channel Groups - Avaya G250 Administration Manual

Configuring WAN interfaces
Access control lists define which packets should be forwarded or denied access to the
network. QoS lists change the DSCP and 802.1p priority of routed packets according to
the packet characteristics. For more information, see
Each interface on the G250/G350 can also have an active policy-based routing list. For
more information, see
Header Compression. Use of header compression reduces the size of packet headers,
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thus reducing the amount of bandwidth needed for data. RTP header compression
enhances the efficiency of voice transmission over the network by compressing the
headers of Real Time Protocol (RTP) packets, thereby minimizing the overhead and
delays involved in RTP implementation. TCP header compression reduces the amount of
bandwidth needed for non-voice traffic. For more information, see
compression

Serial interface overview

A Serial interface is a virtual interface that is created over a portion of an E1/T1 or USP port on
a WAN media module. Serial interfaces support PPP and frame relay encapsulation protocols.
The G350 supports multiple channel groups on the same E1/T1 interface. In contrast, the G250
only supports a single channel group. If a G250 user attempts to create more than one channel
group, an error message appears.

Layer 1 T1 port with two channel groups

Figure 14 illustrates a Layer 1 T1 port with two channel groups defined. All data from each
channel group is encapsulated using PPP protocol, and is distributed over the multiple IP
interfaces defined for each channel group.
Figure 14: Layer 1 T1 Port
266 Administration for the Avaya G250 and Avaya G350 Media Gateways
Configuring policy-based routing
on page 245.
Configuring policy on page 637.
on page 665.
Configuring header