CSU/DSU T1 CARD 5

[drbk563]

Can some please tell me where I can find a configuration guide on how to configure a CSU/DSU T1 for a 3845 Router? For example if I wanted to confiure to work with Verion's T1 service.

Thank You

 

[KiscoKid]

Hi

Does the following help:

http://www.cisco.com/en/US/products/hw/modules/ps3129/products_tech_note09186a00800b1501.shtml

 

[S3M1N0L3]

Tell us what speed the ckt will be running. If it's not Full T1, then you will need to map the proper DS0 channels for fractional T1 service.

Usually for most configs, you need:

framing esf
lincode b8zs
timeslots (channels) 64 (use channels 1-24 if full T1)
clocksource external (set to clock off the provider network).

 

[drbk563]

It would be a Full T1. So I would have to use all channels correct?

 

[jeter]

Yes depending on your application.

Is this to the internet? You need 24 channels.

Is this a PRI? You need 23b plus 1 D channels.

Is this a point to point T1? You need 24 channels.

Do you have all the information for the rest of your programming needs?


“Reserve your right to think, for even to think wrongly is better than not to think at all”

CCNA,CCNP,Network+
Tek-TIP Member 19,650

 

[plshlpme]

your isp/telco should have supplied all the info to you..
ie line code framing and timeslots (not an issue since you are going fullrate T1)

those line codes are probably default on the router anyways but you will need to do the servicemodule t1 timeslots as above and tell the csu to clock on the whole t1.

just make sure you match up to what the provider is giving you.. in some cases they can use other linecodes and framing. (rare)

 

[GeneralZod]

I've just completed a few installs using Verizon T1 circuit. Here is the config which I used for a 256k circuit [Change the DLCI / Channel numbers] and you might not need the BGP config.

Hope this helps.

!
!
interface Serial0/0/0
no ip address
encapsulation frame-relay IETF
service-module t1 timeslots 1-8
!
interface Serial0/0/0.114 point-to-point
ip address x.x.x.x 255.255.255.252
frame-relay interface-dlci 114 IETF
!
!
router bgp 65001
no synchronization
bgp log-neighbor-changes
network x.x.x.x mask 255.255.255.255
redistribute connected
redistribute static
neighbor x.x.x.x remote-as 65000
no auto-summary
!

 

[drbk563]

This is the network setup.


HUB site connected to Site 1 - Site 4 using T1 connection. So since I am using a full T1 service I will be using all 24 channels.

 

[KiscoKid]

All you should need to do is the following:

Interface serial0/0
service-module t1 clock source line [internal]
service-module t1 timeslots 1-24 speed 64

which clock source you use, i.e. internal or line, depends who is providing your clocking currently. If it's a Full TI, I would suggest it may be the T1 provider - thus your clocking should be set to line.

 

[S3M1N0L3]

Even if the ckt is fractional T1, the controller is still full T1. T1s provided by telco, unless Point to Point, almost always get their clock from Telco. So external or line should be the standard if there is ever a doubt.

 

[drbk563]

Well thanks everyone for your help.