Distiance a PRI can be from PBX

[Mulderfox1976]

Good morning

wanted to check what is the maximum distance a PBX can be from a Vendor NU PRI connection. if they are between two floors, say 60- 70 feet apart?

if we patch the PRI from one floor to another and then to the PBX

would it degrade audio calls?

regards
Mulder

 

[Firebird Scrambler]

If the connection is going to be via patching panels, then the type of wiring used will have to be considered assuming the connection type is Ethernet. The quality will vary if the CAT cables are old.

Bearing in mind that some countries are still having to push out ISDN via copper cables to customers would indicate to me that as long as your site has a good connection using e.g. fibre, then you shouldn't suffer that much in the way of line quality.

Fault finding will be interesting in that the telco's end point is on a different floor.



Firebird Scrambler
Nortel Meridian 1 / Succession and BCM / Norstar Programmer in the UK
Advance knowledge on BCM support

http://www.linkedin.com/in/davidbromley

 

[Wanebo]

Like FirebirdScrambler says the type of cable will make a pretty big difference. The old flat satin cables that used to come with CSU/DSU's were only good for very short distances. Say maybe 25 feet. The shielded "fat" cables that Nortel used to ship were available in 50 and 100' lengths. We use CAT 6 cabling whenever we replace any of our T1 or PRI cables.

You should be fine at 60-70 feet. I would put the CSU/DSU on the PBX side simply because then you can let the Telco loop things up to that far while testing, thus eliminating your "long cabling" from being at the heart of any issue.

 

[Mulderfox1976]

Cheers all

I believe its all fibre between floors and we can use CAT 6 shielded cables

 

[KCFLHRC]

PRI's have been ran on old Cat 3 cable for years. No reason for Cat 5 at all. The cable coming in from the outside certainly isn't Cat 5. You can extend the distance from the NIU with setting in your CSU