Free pdf by tekelec about sip signalling

😁
I am back with this pDF> I just skimmed through it and found 28 pages of book is quite infomrative.

it doesnot give intor of many things but then, it deals with moslty maintaining the SIP routers.

I have made sure this is a free PDF 😀 and its not pirated stuff as I got to downlaod it from the company site

anyone who wants to download :
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