Alarms, Errors, and Troubleshooting
555-233-143
4-56 Issue 1 May 2002
Figure 4-35. A500: show switch circuit screen
■ 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 each
EPN.
■ These are established once upon initialization under control of S8700
Multi-Connect 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 S8700
Multi-Connect port networks.
■ Other VBRnrt virtual circuits may exist between A500 ports that are not
associated with S8700 Multi-Connect 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 port network dialed from another
port network, and vice versa?
1. Enter show switch circuit on the A500 console. Figure 4-36 on page
4-57 shows the screen output.
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
_________________________________________________________
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