SIP Trunks to multiple destinations (providers) on the same card?

[thepfy]

Good Evening,

Is it possible to have multiple SIP trunk groups on the same card on the Hipath 4000?

We are in the process of migrating our ISDX to Cisco while upgrading the Hipath to v7. The most likely scenario would be SIP-Q to another Hipath (replacing CorNet) and SIP-Native to one or more Cisco CUBEs.

I appreciate we may be limited in the number of channels by licences and/or channel conncurrency.

Thanks

 

[donb01]

I'm not that up on SIP, but I don't see why you couldn't. You configure channels for SIP trunks, and then when you make the trunk group you just put the Pens you want into the same group just like any other trunk.

Again, I'm not that low level, but I would probably caution you about putting too many high traffic trunks on one board though, or for that matter on the same half shelf. I would have to go through my notes from class to remember the exact number, but I believe each shelf has 256 timeslots - 128 of them on either side of slot 6. So, in theory you could have some combination of phone calls in progress, trunk calls in progress, and other call events in progress until it gets up to 256 and then the next person who picks up the phone won't get dial tone (blocking). This is the same reason you have to try and estimate your phone traffic when you add IP phones - your STMI card may be set up for 240 phones, but there is a risk factor in how many of those phones will be off the hook at once. If a whole shelf had only phones on it, and you have a busy call center, that shelf will still only support 256 events (and an event can be when you pick up the phone to get dial tone).

Anyway - something to consider when designing your trunk density.

Don Bruechert, Voice Comm Analyst II
CareTech Solutions @ Holy Family Memorial
Manitowoc, WI, USA

 

[Moriendi]

You can't mix the SIP and SIP-Q trunks on the same STMI. So one STMI can have multiple destinations if you use GKREG and not SIP profiles on the card itself (configuring a profile will nail it one destination) - but you can't mix the protocol. If you want SIP and SIP-Q, you'll need two cards.