Thanks,
Cassandra
>-----Original Message-----
>From: Russ Taylor <rtaylor@cmc.net>
>To: Mike Tancsa <mike@sentex.net>; portmaster-users@livingston.com
><portmaster-users@livingston.com>
>Date: Tuesday, March 23, 1999 7:28 PM
>Subject: Re: set modem off effect on a PRI (was Re: (PM) Bad modem)
>
>
>>On 3/23/99 7:20 PM, Mike Tancsa (mike@sentex.net) wrote
>>
>>>>The hell it does -- we have three PM cards with bad modems (out of 1
PM-4
>>>>and 8 PM-3s, so not too big a deal). Two of the bad modems self-down,
>>>>the third one has to be manually disabled with a "set modem 30 down".
It
>>>>has absolutly no effect on the PRI span -- that's why you want 48 modems
>>>>for a 2PRI unit (2 spares), or 50 for a 2CT1 unit. This particular
>>>>portmaster is smack in the middle of our dialup pool, we'd know if it
>>>>wasn't taking a full 46 calls.
>>>
>>>
>>>It does on our PRIs. If you have 4 PM3s with half the pool filled and if
>>>only _45_ modems are available (i.e. 3 are dead or off) on the next PM3,
>>>and 45 calls then come in, the next analog call will get a busy signal.
If
>>>you have an ISDN call on there, you will be OK. Search through the
>>>archives. Its been documented / explained before.
>>
>>As I said "that's why you want 48 modems for a 2PRI unit" -- I'm well
>>aware of how the PM-3 allocates modems. If you have multiple dead modems
>>on a chassis, you really ought to RMA the cards. That's not a function of
>>idling out the modem -- that's a function of not having enough DSPs left
>>to populate your PRIs, so yes, you certainly _are_ screwed if you let
>>your PM-3 lose too many modems, or if you're goofy and try to run a mixed
>>ISDN/dialin chassis without a full complement of modem cards.
>>
>>Busying out a modem does not cost you a channel on your PRI, which was
>>what your post that I was replying to said. Having a shortage of DSPs
>>can cost you channels -- and it probably means your roll sequence will
>>break as well.
>>
>>By the way, if it wasn't just dying modems that put you there, it's not
>>very wise to purchase a PM-3 in a 3x10/2x8 configuration for dialup use
>>-- that leaves you with a malfunctioning PM-3 if you lose even one DSP,
>>and they _do_ have a noticable failure rate (3 cards out of 40 for us).
>>
>>--
>>Russ Taylor (rtaylor@cmc.net, http://www.cmc.net/~rtaylor/)
>>Chambers Multimedia Connection Help Desk
>>"When you pay for Dupre, you get Dupre"
>>
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