Frequently Asked Question
FRM220-E1 Quick Setup
Last Updated 5 years ago
These quick steps should get your E1 link extension over fiber up an running in no time. (Please follow anti-static safety procedures when touching a card.)
(1) Get access to the cards and turn off ALL the Dip switches, then for SW-1, turn on only 4&6. The goal here is to make the converters completely transparent to framing and clocking.
(2) If this model is the SFP version, choose a 155M SFP that can run at the lower rate of 36.864Mbps. CTC Union SFP are qualified to run at that speed. A generic "multi-rate" SFP should also work. We know for sure that a 1.25Gbps SFP will not work.
(3) Our RJ45 physical connector is wired as USOC RJ48C (NTU) with pairs 1&2 receiving and pairs 4&5 transmitting.
(4) When connecting to central office, a straight cable should work and the E1 will show a link. When connecting to another NTU device such as a PBX or Router, a crossover cable needs to be fabricated which will cross the pairs 1&2 with 4&5 (Notice: An Ethernet crossover cable will NOT work). If the cable is correct, the Link LED will light.
(5) When everything is connected and powered on, all LEDs will be lit showing Link for E1 and Fiber. The SYNC LED will light if the framing is detected as CAS/PCM30F (SW1-4 On).
(6) In the special case where you are creating a private connection between two NTU device (such as PBX to PBX) it will probably be necessary to provide the clock source for the E1. For the converter located at the central location, additionally turn on SW1-7. Note: the application will probably require crossover cables for the E1 at each end.
(1) Get access to the cards and turn off ALL the Dip switches, then for SW-1, turn on only 4&6. The goal here is to make the converters completely transparent to framing and clocking.
(2) If this model is the SFP version, choose a 155M SFP that can run at the lower rate of 36.864Mbps. CTC Union SFP are qualified to run at that speed. A generic "multi-rate" SFP should also work. We know for sure that a 1.25Gbps SFP will not work.
(3) Our RJ45 physical connector is wired as USOC RJ48C (NTU) with pairs 1&2 receiving and pairs 4&5 transmitting.
(4) When connecting to central office, a straight cable should work and the E1 will show a link. When connecting to another NTU device such as a PBX or Router, a crossover cable needs to be fabricated which will cross the pairs 1&2 with 4&5 (Notice: An Ethernet crossover cable will NOT work). If the cable is correct, the Link LED will light.
(5) When everything is connected and powered on, all LEDs will be lit showing Link for E1 and Fiber. The SYNC LED will light if the framing is detected as CAS/PCM30F (SW1-4 On).
(6) In the special case where you are creating a private connection between two NTU device (such as PBX to PBX) it will probably be necessary to provide the clock source for the E1. For the converter located at the central location, additionally turn on SW1-7. Note: the application will probably require crossover cables for the E1 at each end.