configure fractional channelized T1

Answered Question
May 28th, 2010

Hi,


I have a ds3 capable of 28 full channelized T1s.  I need to configure one of them for 768k.  Would I just configure this to say

t1 1 channel-group 1 timeslots 1-12 instead of t1 1 channel-group 1 timeslots 1-24  on the cpe and pe router?  just the pe?

Thank you

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Correct Answer by Giuseppe Larosa about 6 years 8 months ago

Hello Ikadick,

you need to configure on both ends as both parts need to agree on what DS0 timeslots are usable.

on PE side you need to configure the DS3 and the T1, if the CE has a T1 you will configure only that

Be aware that RED or ADM in the middle may not able to multiplex sub T1 / sub E1 so it may be not possible to use B channels 13-24 for another customer (it depends on RED/ADM capabilities)

see for example:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/10000series/10cfgchspa.html#wp1067532

Hope to help

Giuseppe

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Correct Answer
Giuseppe Larosa Fri, 05/28/2010 - 12:02

Hello Ikadick,

you need to configure on both ends as both parts need to agree on what DS0 timeslots are usable.

on PE side you need to configure the DS3 and the T1, if the CE has a T1 you will configure only that

Be aware that RED or ADM in the middle may not able to multiplex sub T1 / sub E1 so it may be not possible to use B channels 13-24 for another customer (it depends on RED/ADM capabilities)

see for example:

http://www.cisco.com/en/US/docs/interfaces_modules/shared_port_adapters/configuration/10000series/10cfgchspa.html#wp1067532

Hope to help

Giuseppe

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