G K Reddy Chinthalapudi

Layer 2 Functionalities Framing Error detection & Correction Multiplexing Flow Controller Framing Issues LAPD uses HDLC frame format for framing. Where as LAPDm uses synchronization scheme of radio interface to convey information on frame limits. LAPDm avoids using flags by ready-made blocks of the physical layer. LAPDm(LAPD modified) frame has a maximum length of 23 octets on all TCH channels and 21 octets on SACCH blocks(remaining 2 octets are for Timing Advance and Transmission Power Control). But the actual frame length is less than 23/21 octets, so Length Indicator(LI) is included in each frame to identify the length of the frame. Segmentation & Reassembly There is no need of segmentation & Reassembly in LAPD(the length of the Abis LAPD frame is 264 octets excluding flags, which corresponds to 260 octets of upper layer information). Where as LAPD requires segmentation& reassembly because maximum frame length of 21 or 23 octets is not sufficient for most signalling ...

Layer 2 Functionalities Framing Error detection & Correction Multiplexing Flow Controller Framing Issues LAPD uses HDLC frame format for framing. Where as LAPDm uses synchronization scheme of radio interface to convey information on frame limits. LAPDm avoids using flags by ready-made blocks of the physical layer. LAPDm(LAPD modified) frame has a maximum length of 23 octets on all TCH channels and 21 octets on SACCH blocks(remaining 2 octets are for Timing Advance and Transmission Power Control). But the actual frame length is less than 23/21 octets, so Length Indicator(LI) is included in each frame to identify the length of the frame. Segmentation & Reassembly There is no need of segmentation & Reassembly in LAPD(the length of the Abis LAPD frame is 264 octets excluding flags, which corresponds to 260 octets of upper layer information). Where as LAPD requires segmentation& reassembly because maximum frame length of 21 or 23 octets is not sufficient for most signalling ...

Creating Tags for source code ----------------------------------------------------------------- 1. Create files.list as follows $ find . > files.list 2. Open files.list in gvim gvim files.list 3. Remove svn/cvs related lines as Ex: removing svn related lines in gvim in command mode as :%g/.svn/d 4. Save and quit the file files.list :wq 5 Create tags as $ ctags `cat files.list` ----------------------------------------------------------------- Open files.list in gvim.. commands for different operatioons gf - get file (opening file) CTRL+ o - for previous file CTRL+ t - jump back CTRL + ] - for tag ( function/ structure/ MACRO etc...) ------------------------------------------------------------------- ------------------------------------------------------------------ Thanks G K Reddy

Converting code from lower case to upper case in gvim 1.Enter into visual Mode (By pressing v in Escape mode) 2.Select code that you want to convert to upper case using arrow keys 3 Press SHIFT+u to convert selected code into upper case. Thanks G K Reddy

This is RBI document this gives IFSC and MICR codes of list of bank branches that support NEFT enabled transactions Thanks G K Reddy Chinthalapudi