Hi all.
I have an ICS with many DRU-s at remote locations, all connected to the ICS 2400 via E1, using the proper DAIA interface cards. The E1-s are carried to remote sites via fiber multiplexer. This has been installed in the last millenia (no joke) and have been bullet-proof. However, the multiplexer is now aging and has been discontinued and in this day and age, everything is IP. So I have purchased a set of E1-over-IP devices and having the hardest time making them work. The main problem I run into is at the pbx side, when I connect an E1 into this tdmoip device I get crc errors on the DAIA card in the switch, and the DRU at the remote site can barely maintain sync.
One of these devices can handle 16 E1 ports. I managed to get 2 E1-s hooked up in a stable manner and thus running 2 DRU-s now for 2 weeks without problem. However, when I connect the 3rd E1 on the pbx site, not only do I have crc errors on this E1, it also generates crc errors on the 1st 2 working E1-s.
This tdmoip device has dual 48vdc power supplies, and I noticed that if I unplug one of the power cords, the first 2 E1-s also become flaky. My biggest attention is on some possible grounding problem. The pbx, the equipment rack and the tdmoip device are all grounded properly. The power plug for the tdmoip device has 3 prongs, +, -, and ground and I'm thinking all is grounded properly. But not sure. There are settings on teh DAIA card I played with as well: pad settings for wiring lenght between pbx and tdmoip device, there is a switch to specify if I'm using 24awg x-connect wire for E1 or coax, there is also a switch for some grounding setting. I think I tried all possible combination of all the above discussed settings - to no avail. The manufacturer of the tdmoip device swears they tested it fully before shipping it to me. But for the life of me, I can't go beyond 2 E1-s. My IP connection is gigabit between the 2 sites, with qos configured properly, so I don't have bandwidth problems (2xE1 is only around 5mbps anyways). The manufacturer is now sending me another set to try (I ordered that one with AC power supplies) But I have to wait a week or two before that arrives.
Meanwhile, anybody has any bright ideas?
I have an ICS with many DRU-s at remote locations, all connected to the ICS 2400 via E1, using the proper DAIA interface cards. The E1-s are carried to remote sites via fiber multiplexer. This has been installed in the last millenia (no joke) and have been bullet-proof. However, the multiplexer is now aging and has been discontinued and in this day and age, everything is IP. So I have purchased a set of E1-over-IP devices and having the hardest time making them work. The main problem I run into is at the pbx side, when I connect an E1 into this tdmoip device I get crc errors on the DAIA card in the switch, and the DRU at the remote site can barely maintain sync.
One of these devices can handle 16 E1 ports. I managed to get 2 E1-s hooked up in a stable manner and thus running 2 DRU-s now for 2 weeks without problem. However, when I connect the 3rd E1 on the pbx site, not only do I have crc errors on this E1, it also generates crc errors on the 1st 2 working E1-s.
This tdmoip device has dual 48vdc power supplies, and I noticed that if I unplug one of the power cords, the first 2 E1-s also become flaky. My biggest attention is on some possible grounding problem. The pbx, the equipment rack and the tdmoip device are all grounded properly. The power plug for the tdmoip device has 3 prongs, +, -, and ground and I'm thinking all is grounded properly. But not sure. There are settings on teh DAIA card I played with as well: pad settings for wiring lenght between pbx and tdmoip device, there is a switch to specify if I'm using 24awg x-connect wire for E1 or coax, there is also a switch for some grounding setting. I think I tried all possible combination of all the above discussed settings - to no avail. The manufacturer of the tdmoip device swears they tested it fully before shipping it to me. But for the life of me, I can't go beyond 2 E1-s. My IP connection is gigabit between the 2 sites, with qos configured properly, so I don't have bandwidth problems (2xE1 is only around 5mbps anyways). The manufacturer is now sending me another set to try (I ordered that one with AC power supplies) But I have to wait a week or two before that arrives.
Meanwhile, anybody has any bright ideas?