TLU76 - TLU79

[vince62s]

What is the difference between TLU76 and TLU79 ?

there are a bunch of connectors on the TLU76 but only the bottom one is connected to a 30ISDN box

is the only difference the fact that TLU79 has only 4 channels?

thanks

 

[RFLII]

The TLU76 is an board for an ISDN PRA connection. The TLU79 is for BRA conection

 

[vince62s]

well I am not that technical....
what is the difference?

thanks.

 

[SYAR2003]

TLU76/1 has 32 timeslots
PRI/PRA = ISDN Primary Rate interface/Primary Rate Access
0 for syncronization
16 for common signalling
and channel 1-15 + 17-31 for carrying voice/data
Each channel is 64kbit witch means the board is a 2Mbit interface board .
Giving it a total of 30 speech channels .
(30 trunks + Sync channel + Signalling channel)

TLU79
Has four time 2B+D channels (BRI / BRA)
BRI/BRA = ISDN Basic Rate interface/Basic Rate Access
One B channel is 64kbit and the signalling channel is 16kbit.
Giving it a total of 8 speech channels .
(8 trunks + 4 signalling channels one pr. BRI)


How is that for an explanation of difference
SYAR

 

[vince62s]

thanks SYAR, thats' clear.

Now, can I connect an ISDN interface of a Cisco Router to one of these boards? both of them or just one kind ?

thanks

 

[SYAR2003]

TLU76

 

[vince62s]

additional questions:

on the TLU 76 there are potentially 8 connectors.

are all the 30 voice channels connected to the bottom one ? (thats's the one connected to my T2 box)

what are the others for?

if I have to connect my other TLU76 to a cisco router, will it transport all the 30 voice channels?

thanks

 

[SYAR2003]

Connections to use is on the lower half of the board


A B C

x x x
x x x
x x x
x x x

x x x
x x x
x x x
x x x

x x x
x x x
x x x
x x x

x x x
x x x
x x x
x x x

_____
| |
| |
| |
_____

x x x 02
x x x 04
x x x 06
x x x 08

x x x 10
x x x 12
x x x 14
x x x 16

x x x 18
x x x 20
x x x 22
x x x 24

x x X 26
x x X 28
x x Y 30
x x Y 32

TLU76, 120 ohm twisted pair cable
connects to the fourth connector set
on the lower half.
bold marked X is is the boards tx pair
bold marked Y is is the boards rx pair


Connections is on the lower half of the board


A B C

x x x
x x x
x x x
x x x

x x x
x x x
x x x
x x x

x x x
x x x
x x x
x x x

x x x
x x x
x x x
x x x

_____
| |
| |
| |
_____

x x x 02
x x x 04
x x x 06
x x x 08

x x x 10
x x x 12
x x x 14
x x x 16

. . . 17
X X X 18
X Y X 19
X X X 20
. . . 21
X X X 22
X Z X 23
X X X 24

x x x 26
x x x 28
x x x 30
x x x 32

TLU76, 75 ohm coaks cable
connects to the third connector set
on the lower half.
bold marked Y is is the boards tx pin
bold marked Z is is the boards rx pin
bold marked X is is the boards coaks shield(GND)

 

[vince62s]

Thanks SYAR!

if I understand well:

1st part of your answer: TLU76 to T2 box
2nd part of your answer: TLU76 to Cisco Router

now, it means I can use a single TLU76 for both connections, right?

how will the split between the 30 channels be handled?

 

[SYAR2003]

I'm not sure if you get it .
It depends if the external equipment is delivering
a 75ohms coaks interface or a RJ45 120ohm pair connection.

I don't know what you mean by a t2box but if it has a coaks
interface yes it connects to a tlu76 at the third connector.
And if it has a rj45 120ohm pair connector it connects
to the tlu76 at the fourh connector.

cisco routers delivers 120ohm pair via rj45 connector.

 

[vince62s]

ok I see. clearer.

it means I have to use the second TLU 76

just for info, the T2 box is the telco trunk with 30 ISDN channels.

but I still cant see how I can use the second TLU76 for internet access over ISDN through the cisco router.

is all of this just for voice?
maybe I should invite you in Paris!

 

[SYAR2003]

Explain to me what you are trying to achieve here.
I'm stumped.

 

[vince62s]

I am trying or planning 2 different things:

1) internet access through ISDN for backup purpose. I dont want to order a new ISDN line since I already have these 30 channels. My idea is to connect the cisco router to a ISDN interface of the MD 110 , then I could have internet access.

2) My other plan is to have a remote site connected to the internet and have voice over IP with the TLU76 connection to the cisco router.

clearer?

 

[mdfan]

Vince , I think we are mixing telecom and datacom here.
1) The ISDN of the MD110 is connected to PSTN and not a ISP . How can you access Internet through this ISDN then ? It must be through a dial-up connection then towards an ISP from a S0 equipment in the MD110. Or ?

2) This is possible , what kind of equipment do you plan to deploy at the remote site ? WEBSWITCH2000 ?

 

[vince62s]

1) I see your point. However, what is a S0 equipment? I just have ELU28 and ELU29 cards plus a TLU79. I was trying to use existing equipment, but maybe I cannot accomplish dial-up over ISDN with these.

2)ideally I would like to do the same thing at the other end but I need to find out the PBX model first.

thanks

 

[mdfan]

Dial-up over ISDN from the MD110 , pls use either S0 adapter / Dual Access product which actually uses uses the ELU28/3 card configured with 32 individuals instead of 16.
Or use ELU26 which gives you 4 BRA interfaces from within the MD110.

From any one of these products , just dial 0 + the ISP access number.

 

[ozgur74]

AND TLU64 ?
Is it same ?
what is TLU64 , differances ?

 

[SYAR2003]

Duvel ! whats the difference of having
a So/BRI connected to the router and a PRI from the MD.
Access to internet would be possible anyway.

 

[vince62s]

ok SYAR, so what's the step-by-step PRI/MD solution?

 

[SYAR2003]

Simple scematics

[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] . . . . [/tt]
[tt] . . [/tt]
[tt] . . [/tt]
[tt] . LAN . [/tt]
[tt] . . SITE A [/tt]
[tt] . -------- . [/tt]
[tt] . |router| . [/tt]
[tt] ---^---- . [/tt]
[tt] ^ . | . [/tt]
[tt] | . . | . [/tt]
[tt] | | |-------| [/tt]
[tt] | | | MD | [/tt]
[tt] | | | | [/tt]
[tt] | | |--| |--| [/tt]
[tt] | (2)T|L U 76| | | T|L U 76 pstn(1) [/tt]
[tt] | |<------- | | ----------> [/tt]
[tt] WAN | | | | [/tt]
[tt] | |--|-|--| [/tt]
[tt] | [/tt]
[tt] | [/tt]
[tt] | [/tt]
[tt] | [/tt]
[tt] - - | - - - - - - - - - - - - - - - - [/tt]
[tt] | [/tt]
[tt] | [/tt]
[tt] | . . . . [/tt]
[tt] |. . [/tt]
[tt] V . [/tt]
[tt] . LAN . [/tt]
[tt] . . SITE B [/tt]
[tt] . -------- . [/tt]
[tt] . |router| . [/tt]
[tt] . ---^---- . [/tt]
[tt] . | . [/tt]
[tt] . . | . [/tt]
[tt] | |-------| [/tt]
[tt] | | MD | [/tt]
[tt] | | | [/tt]
[tt] | |--| |--| [/tt]
[tt] (4)T|L U 76| | | T|L U 76 pstn(3) [/tt]
[tt] |<------- | | ----------> [/tt]
[tt] | | | | [/tt]
[tt] |--|-|--| [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]
[tt] [/tt]