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The Cisco 2811 at work employs approximately 10~12 phones.

None of the phones are displaying caller id though every line is configured for it.

voice-port 0/0/0
 connection plar opx 2000
 caller-id enable
!
voice-port 0/0/1
 connection plar opx 2000
 caller-id enable
!
voice-port 0/0/2
 connection plar opx 2000
 caller-id enable
!
voice-port 0/0/3
 connection plar opx 2000
 caller-id enable

Everyone is also experiencing dropped calls, where the line will immediately terminate.

This isn't a live show config of the router. It's a previous config that was taken when everything was functional. I'll double check the config in the morning but does anyone have any idea why this would begin to happen out of the blue? The router is on a backup power supply but even if it did restart shouldn't it load from the startup-config which I copied from the running config.

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    Where are the calls originating and where are the calls terminating? Have you checked the cpu and memory on the router? Are the phones directly attached to the router or do they go through a switch? Were there any changes made around the time this problem started? – Avery Abbott Jun 24 '14 at 2:27
  • And yes, when the router boots up, it will load the startup config into memory where it becomes the running config. – Avery Abbott Jun 24 '14 at 2:32
  • @AveryAbbott the dropped calls are originating from all over and it does not matter to which phones they terminate, it is indiscriminate. The phones are directly attached to the router and do not go through a switch. There were no changes made to the routers config around the time this problem started. It was noted however that the service provider was seen working on the comms box down the road, if this makes any difference at all. How can I check the CPU and mem on the router? – gh0st Jun 24 '14 at 16:38
  • @AveryAbbott the CPU and memory look fine. Processor Pool Total: 149663776 Used: 44106780 Free: 105556996 I/O Pool Total: 14680064 Used: 6650000 Free: 8030064 CPU utilization for five seconds: 8%/0%; one minute: 7%; five minutes: 7% – gh0st Jun 24 '14 at 17:04
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    @AveryAbbott I restarted the router and that did the trick. – gh0st Jun 28 '14 at 20:55
1

Restarting the router resolved the issue.

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