Specifications

Chapter 1 - Getting Started Administration Manual (SIP/MGCP Version)
AT-VP504E FXS 2
• SIP or MGCP protocol for call management
• T.38 for fax relay
Supports the following Codecs:
• G.711 (µ-law, A-law)
• G.723.1A
• G.729 A rev. B
• T.38 (fax) over UDP only
Supports Quality of Service technologies.
• Differentiated Services Field (DSCP)
• IEEE 802.1q user priority tagging
Implementing the
AT-VP504E FXS
Solution
When an Internet telephony call is placed from one location to another,
the voice signals pass through the AT-VP504E FXS. The voice signals
are compressed into data packets, which are then diverted by the unit
onto an IP/data network such as the Internet, or another type of data
network. Upon reaching its destination, the data is converted back into
voice signals, then fed into the corresponding endpoint.
The AT-VP504E FXS system utilizes technology that optimizes
available bandwidth, so users do not hear echoes, stops and starts, or
annoying clicks and pops. When traffic congestion is properly
managed, AT-VP504E FXS customers cannot tell that their
conversation is being carried over a packet network rather than the
traditional Switched Circuit Network (SCN).
See the
AT-VP504E FXS User’s Manuals for call processes examples.
Features The following table lists some of the features the AT-VP504E FXS
offers.
Table 1: AT-VP504E FXS Features
Feature Description
4 FXS Ports Central Office quality SLICs supporting all the
BORSCHT functions and thus meet most world wide
telephony standards.