DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance for csi systems
1-131ATM Tips
1
■The pp VBRnrt (Variable Bit Rate) virtual circuits between A500 ports A1.1
(PPN) and A1.2 (EPN) are used for signaling between the PPN and eac h
EPN.
■These are established once upon initialization under control of DEFINITY
Call Processing. They represent the ATM Control Link (ACL) and
Expansion Archangel Link (EAL).
■VBRnrt virtual circuits are also be used for ISDN channels between
Definity port networks.
■Other VBRnrt virtual circuits may exist between A500 p orts that are not
associated with DEFINITY port networks. A common use of VBRnrt circuits
is multimedia and video -conferencing systems.
CaPro Layer
Are talk paths being established between port networks?
Diagnostics
■Can you talk both ways on a set on one por t network dialed from another
port network and vice versa?
1. Enter show switch circuit on the A500 console. Figure 1-60 shows the
screen output.
Figure 1-60. A500:show switch circuit screen
A500:show switch circuit
_______________________________________________________
| Input | Output | Connection |
| port vpi vci| port vpi vci| type class parameters |
|______________|______________|_________________________|
A1.1 0 5 Self 0 1 pp UBR ppd on
A1.1 0 32 A1.2 0 32 pp VBRnrt pcr=5729 /scr=5729 /mbs=17187
A1.1 0 35 A1.2 0 35 pmp CBR pcr=173
A1.2 0 5 Self 0 2 pp UBR ppd on
A1.2 0 32 A1.1 0 32 pp VBRnrt pcr=5729 /scr=5729 /mbs=17187
A1.2 0 34 A1.1 0 34 pmp CBR pcr=173
Self 0 1 A1.1 0 5 pp UBR ppd on
Self 0 2 A1.2 0 5 pp UBR ppd on
_________________________________________________________