ADTRAN ATLAS, User Manual

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Chapter 6. Frame Relay Configuration Examples
61200263L1-1.1 ATLAS Frame Relay User Manual 6-17
EXAMPLE 7: PRIVATE FRAME RELAY NETWORK WITH
DEDICATED BACKUP
Example 7 depicts a private frame relay network connecting two sites (see
Figure 6-44). An ATLAS 800
PLUS
with a frame relay upgrade exists at each
site. A full T1 private frame relay connection exists for routing compressed
voice traffic. Another full T1 private frame relay connection exists between
the two sites to route IP traffic (data and compressed voice). Each ATLAS
must include a Voice Compression and T1/PRI module to support these re-
quirements.
In the event of a problem on the T1 circuit dedicated for voice traffic, the sec-
ond T1 can be used to reroute the voice traffic, sharing bandwidth with the
IP traffic. To re-create this example, follow the process discussed below to
configure the ATLAS in Atlanta. The ATLAS in Boston requires a similar
configuration.
Figure 6-44. Private Frame Relay Network with Dedicated Backup
Step 1 Create the packet endpoints, two frame relay endpoints for the private frame
relay links, and one TBOP link for carrying the signaling between the PBXs.
Select the signaling role of
B
OTH
for the link used for backup (see Figure 6-
45).
Figure 6-45. Menu for Creating Packet Endpoints
Step 2
Configure the sublinks for the voice link.
All 23 voice channels can be carried by one sublink transported on five DS0
channels to Boston. One DS0 channel and one sublink are required for the
TBOP channel carrying the signaling between the PBXs. To ensure that both
the voice and the TBOP sublinks are allocated their necessary frame relay
bandwidth, set the Quality-Of-Service (
QOS
) parameter with 64k allocated
to the TBOP channel and 320k (5*64) allocated to the voice channels. The re-
Private
Frame Relay
Network
ATLAS 800
PLUS
with frame relay upgrade
Atlanta
T1
L
A
N
PBX
T1
ATLAS 800 PLUS
with frame relay upgrade
T1
PBX
L
A
N
T1
Boston
Compressed Voice
Only
Data
&
Compressed Voice
Backup