Specifications

Design Consideration for a VoFR Network 17
2.7.1 Hunt Group Design using IBM 2212 and IBM 9783
Figure 14. IBM 9783 Hunt Group Function
The IBM 9783 routing table supports alternate routes. In the above network
design, if 201 is busy talking to another number using an IBM 9783 circuit group,
the IBM 9783 can find another route using an alternate route and can connect to
202 depending on whether it complies with the match destination rule. Each route
rule entry can support up to 15 characters. See 4.2.6, “Sample Scenario with
Hunt Group Facility in IBM 9783” on page 136 for a detailed configuration.
2.7.2 The Number of IBM 9783s Needed
Increasing the number of IBM 9783s in the network can prevent the following IBM
9783 limitations:
• Match Rule table 0 to 114 entries
• Route Rule 0 to 119 entries
1
• Output Rule table 0 to 31 entries
• Translation Rule case 0 to 99
1
• Node ID x,x,x,1 to x.x.x.254 (max 254 nodes in the network)
• Circuit Group 1 to 127 (max 127 circuit group per IBM 9783)
• MAX GDI interface 192 kbps (MAX 19 channels using 9.6 kbps E-celp at same
time)
1 It is possible to reduce this limitation using an alternate route wild card.
IBM
2212B
IBM
PBX
101 102
9783
2212C
IBM
PBX
201 202
Frame Relay