## Distance problem on 2616/3904 sets?

## Distance problem on 2616/3904 sets?

(OP)

Hi guys,

I have been battling an intermittent problem for quite awhile with phones that seem to die, or act up when booting up..... sometimes I can get them to come up and other times I can't. Sometimes a 3904 will run on a line when a 2616 won't on the same line? It's a pretty long run from the OPT81 to the building where this is happening. Not sure on the distance but I bet it's at least 1500 ft. maybe more....

I imagine it's right on the edge of to far. Is there a way to boost the signal on a TN port basis? Or maybe on a whole card even? I'm at a loss as to what I can do....?

I have been battling an intermittent problem for quite awhile with phones that seem to die, or act up when booting up..... sometimes I can get them to come up and other times I can't. Sometimes a 3904 will run on a line when a 2616 won't on the same line? It's a pretty long run from the OPT81 to the building where this is happening. Not sure on the distance but I bet it's at least 1500 ft. maybe more....

I imagine it's right on the edge of to far. Is there a way to boost the signal on a TN port basis? Or maybe on a whole card even? I'm at a loss as to what I can do....?

## RE: Distance problem on 2616/3904 sets?

ANALOGUE EXTN LINE LIMITS / DIGITAL LOOP RESISTANCE.

For 500 set:

REN 1/2...........MAX LOOP RESISTANCE......1000 OHMS

REN 3.............MAX LOOP RESISTANCE...... 900 OHMS

REN 4..............MAX LOOP RESISTANCE...... 600 OHMS

REN 5..............MAX LOOP REISTANCE......... 350 OHMS

For 500 set:

ASSUMING YOU ARE USING 0.5MM COPPER CABLE THE

FOLLOWING IS A GUIDE TO THE MAXIMUM LENGTH OF

CABLE TO BE USED:-

REN 1/2..............11.4 KILOMETRES

REN 3.................10.25 KILOMETRES

REN 4.................6.8 KILOMETRES

REN 5.................4 KILOMETRES

PLEASE NOTE :: THESE FIGURES ARE FOR THE LINE LOOP

SO FOR EXAMPLE,AN EXTN WITH A REN OF 5 SHOULD NOT

BE FITTED MORE THAN 2 KILOMETRES FROM THE EQUIPT.

R = p.l/a

where R = resistance

p = resistivity ( copper is 17.2 x 10 to the power -9 )

l = length in metres

a = cross sectional area of the conducter ( metre sq )

For Aries type set:

Digital set loop resistance must be below 175 ohms. (approx 3000 ft)

############################

DIGITAL SETS ON NT8D02 I/F 1000m MAX.

############################

Firebird Scrambler

Nortel & Avaya Meridian 1 / Succession & BCM / Norstar Programmer

Website = http://somertel.com

linkedin

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

## RE: Distance problem on 2616/3904 sets?

OLD ROLMEN WORKING ON NORTELS AND AVAYA

## RE: Distance problem on 2616/3904 sets?