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2851 T1 clock and slip

2851 GW, 4 slots are ok to insert VWIC2-2MFT-T1/E1. My question is about the clock.

1. If I have two T1s in the one slot connecting to same PBX, how should I configure the clock on this two T1s?

2. If I have one more T1 in the 2nd slot which alos connects to the same PBX, how should I program the 3rd one's clock?

Btw, PBX gets clock from PSTN and distribute clock to GW.

I tried different combinations but there alwasy slips in either 1 or 2 T1s.

Thanks

Thanks

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Re: 2851 T1 clock and slip

When you configure network clock use, you select which modules participate and what the source of the network clock will be.To configure the clock source of a DS1 link, use the clock source command in interface configuration or ATM interface configuration mode. To restore the default line setting, use the no form of this command.< clock source {line | internal | loop-timed}

http://www.cisco.com/en/US/products/sw/iosswrel/ps5207/products_command_reference_chapter09186a00801a7ea1.html#wp1202063

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