Why was MGCP developed when we already had H.323 & SIP?
I can understand that H.323 has complex debug messages and its tough to debug failures, SIP resolved that issue by having simple text message/response and had better services implemented on SIP stack.
But the question is what was the need of development of MGCP stack when H.323 & SIP were dominant in market, how does it makes VoIP network different and better for end user & is it better than H.323 & SIP network??
Any pros & cons will be appreciated..
Its not a assignment question so pointers and subjective replies will do good.

Thanks in advance

Looking to avoid having to buy a single SIP phone and then an additional gateway so that it can intelligently route the call across either the local analog POTS line or the IP connection back to corporate.

For example - is a store manager needs to call corp or check voice mail it goes across the IP network, but if the manager places a call that is local it does not route across to corp to place the call - it grabs the POTS line @ store and places the call.

Net  Telephone

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Net  Telephone Features:

Net Telephone

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Hosted VOIP is a cost efficient choice to standard, PBX telephone systems. Prevailing and easy to use, and significantly less expensive than on site PBX solutions and offer bigger adaptability. Providing the proper features for your company demands is definitely critical. A Hosted VOIP solution has many state of the art features like, car attendants, follow-me routing, voicemail, voicemail to e-mail, forwarding, external IP telephones, and so on. The call costs for outside network calls are also low. Texts : You can type your text using your keyboard and send the message thru your 'VoIP ' network, showing your own mobile number.

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Ask VoIP suppliers about how they cope with robbed routers and whether or not they can be disabled remotely to keep your account info safe and untouched. If you want to keep your telephone conversations personal even from the telephone company, select a service supplier who lets you call thru virtual private networks. Never choose a service that can't guarantee security of your secret info. Nonetheless keeping all information inside VPNs comprises extra hardware and software costs. Is the VoIP Service exposed to Scammers and impersonators? Conmen can hijack calls and pretend to be consumer service delegates to gather private account information.