We are getting regular clock slips one our PRIs connected to one of our IP500 systems. Here's the detail.
We had a 406V2 and it has slips from the very beginning, the carriers fiddled and it was reduced to on occasional slip. We replaced the 406 with a 500 about 2 years ago and all was well (PRI 48 in a legacy card carrier). Over the past 4 months we have been having issues with dropped calls on the PRI, after finally getting our users to identify the issue we traced it down to clock slips on one of the PRIs, we will call this PRI 2. PRI1 is the network clock source, PRI2 is set to fallback. Which ever line is the network source is fine and whichever is the fallback/unsuitable won't work. Since one carrier is a CLEC and the other is a long distance provider, neither is providing the local loop, the LEC (Verizon) is doing that. Both PRI vendors claim they must be the clock source, but it is my understanding that there can only be one clock source on the IP Office unit. The latest from the vendor is that the line is clear up to the NIU and that from the NIU to the CSU it is not passing the 1:8 test. This of course makes sense because the clock is slipping. I keep demanding that they send someone out to verify that the clocks on the two PRIs are in sync, but they both claim this is not possible. Am I stuck in a catch 22?
We had a 406V2 and it has slips from the very beginning, the carriers fiddled and it was reduced to on occasional slip. We replaced the 406 with a 500 about 2 years ago and all was well (PRI 48 in a legacy card carrier). Over the past 4 months we have been having issues with dropped calls on the PRI, after finally getting our users to identify the issue we traced it down to clock slips on one of the PRIs, we will call this PRI 2. PRI1 is the network clock source, PRI2 is set to fallback. Which ever line is the network source is fine and whichever is the fallback/unsuitable won't work. Since one carrier is a CLEC and the other is a long distance provider, neither is providing the local loop, the LEC (Verizon) is doing that. Both PRI vendors claim they must be the clock source, but it is my understanding that there can only be one clock source on the IP Office unit. The latest from the vendor is that the line is clear up to the NIU and that from the NIU to the CSU it is not passing the 1:8 test. This of course makes sense because the clock is slipping. I keep demanding that they send someone out to verify that the clocks on the two PRIs are in sync, but they both claim this is not possible. Am I stuck in a catch 22?
