[asterisk-users] Digium G100 and CID Dropping First Digit.

[David Klaverstyn]

On Mon, Jan 15, 2018 at 10:41:27PM +0000, David Klaverstyn wrote:
> port1 < Calling Number (len=12) [ Ext: 0  TON: National Number (2)  NPI: ISDN/Telephony Numbering Plan (E.164/E.163) (1)
> port1 <                           Presentation: Presentation allowed of network provided number (3)  '21xxxxxx' ]
> port1 < [70 0a c1 30 34 39 31 34 31 32 31 34]
> port1 < Called Number (len=12) [ Ext: 1  TON: Subscriber Number (4)  
> NPI: ISDN/Telephony Numbering Plan (E.164/E.163) (1)  '049xxxxxx' ]
> 
> -- Accepting call from '21xxxxxx' to '049xxxxxx' on channel 0/5, span 
> 1

Don't know anything about the card you are using, but seeing ISDN signaling that the type of number (TON) is national and that means overhere that leading zeros are stripped, I see nothing wrong with it.
Looking at my old chan_dadhi configs there are options to prefix something based on TON. So over here I have configured:
nationalprefix = 0
to prefix the leading 0 for national numbers that callees expect.
The G100 manual contains the phrase "national prefix", but no info about it, so look into those prefix options.

--

I feel stupid now.  I should have figured that one out.  

On the Digium gateway: Configuration > T1/E1 > Advanced Signalling  > PRI Options : International, Nation and Local prefix.

Once I entered the correct digits International 00 and National 0, CID worked as expected.