I have been reviewing postings on using a PRI as a TIE trunk and after review I am still somewhat confused. Most of the examples were using a PRI to connect a Nortel system to another vendor like Cisco equipment.
The questions relate to setting up a PRI tie line on an option 81C
I would like to outline my understanding of the process and ask some questions.
1) In LD 73 you define who your reference clock will be. Typically it is going to be from a trunk facing a carrier.
2)In the ADAN for the D-channel there is a CLOK parameter with options EXT or INT. I am not exactly sure what these settings do particularly in reference to a Tie Line. On a Tie Line circuit one end of the circuit will clock and the other receives clock.
Questions:
a) I assume that the CLOK EXT setting has nothing to do with the fact that in LD 73 you accepted clocking from the carrier an external source. Is this correct?
b) From looking at other postings I am assuming that if you want the Nortel end of the circuit to clock the PRI the CLOK setting would be optioned EXT. The other side would have to be optioned to accept clocking from the Nortel end.
c)What happens if you want to connect two Nortel PBXs on a PRI tie Trunk, do you option one side to be CLOK EXT and the other CLOK INT?
The other question around using a TIE line facility is the ISDN protocol type. With ISDN one side of the connection has to be network and the other user side.
I have seen suggestions in the postings that if you option the nortel for network side you are then restricted in what ISDN protocol types you can use.
d) is this true or is it a case of - depends on what software releases you are running? There was some suggestions that if you option the Nortel for network side it is going to be protocol type SL1 - which is non standard.
e) Again I am assuming that the CLOK EXT option means that this Nortel side of the connection clocking the line. I have seen configurations in which the Nortel was set to CLOCK EXT yet for SIDE USR. Is there any restrictions on having the Nortel set to clock the line but operating as the user side?
The questions relate to setting up a PRI tie line on an option 81C
I would like to outline my understanding of the process and ask some questions.
1) In LD 73 you define who your reference clock will be. Typically it is going to be from a trunk facing a carrier.
2)In the ADAN for the D-channel there is a CLOK parameter with options EXT or INT. I am not exactly sure what these settings do particularly in reference to a Tie Line. On a Tie Line circuit one end of the circuit will clock and the other receives clock.
Questions:
a) I assume that the CLOK EXT setting has nothing to do with the fact that in LD 73 you accepted clocking from the carrier an external source. Is this correct?
b) From looking at other postings I am assuming that if you want the Nortel end of the circuit to clock the PRI the CLOK setting would be optioned EXT. The other side would have to be optioned to accept clocking from the Nortel end.
c)What happens if you want to connect two Nortel PBXs on a PRI tie Trunk, do you option one side to be CLOK EXT and the other CLOK INT?
The other question around using a TIE line facility is the ISDN protocol type. With ISDN one side of the connection has to be network and the other user side.
I have seen suggestions in the postings that if you option the nortel for network side you are then restricted in what ISDN protocol types you can use.
d) is this true or is it a case of - depends on what software releases you are running? There was some suggestions that if you option the Nortel for network side it is going to be protocol type SL1 - which is non standard.
e) Again I am assuming that the CLOK EXT option means that this Nortel side of the connection clocking the line. I have seen configurations in which the Nortel was set to CLOCK EXT yet for SIDE USR. Is there any restrictions on having the Nortel set to clock the line but operating as the user side?
