asterisk users - Jan 2007 - SIP + short numbers + name of customer

We are using a couple of Grandstream GXP2000 SIP-phones with Asterisk.

In our dial-plan, we have implemented a list of short numbers in 
extensions.conf, like:
exten => 1234,1,Dial(Zap/0987654321)

So when I pickup the SIP-phone, and I dial 1234, the system dials 
0987654321 and connects me to that customer. Unfortunately I cannot see 
the name of the customer, and I do not know if perhaps I punched the 
wrong short number.

Is there a way to have Asterisk print the name of the customer on the 
SIP-phone display, instead of "1234"? Maybe the implementation (see 
above) is not optimal, and there is better way to deal with these short 
numbers?

The same question for incoming calls: it would be great to have Asterisk 
print the name of the customer on the display when a call comes in, 
instead of his phone number 0987654321.

Z.

Zoilo Gomez wrote:
> So when I pickup the SIP-phone, and I dial 1234, the system dials 
> 0987654321 and connects me to that customer. Unfortunately I cannot see 
> the name of the customer, and I do not know if perhaps I punched the 
> wrong short number.
> 
> Is there a way to have Asterisk print the name of the customer on the 
> SIP-phone display, instead of "1234"? Maybe the implementation
(see
> above) is not optimal, and there is better way to deal with these short 
> numbers?
In general the answer to his is "No."  However, many SIP phones
support
a directory on the phone, if you put in a directory entry into the phone 
for that customer then that info should show up when you dial.  Remember 
the GS BT101 CANNOT display anything except numbers on its display.

> The same question for incoming calls: it would be great to have Asterisk 
> print the name of the customer on the display when a call comes in, 
> instead of his phone number 0987654321.
This is the default if Asterisk gets Caller*ID with the call.  On PRI 
the Caller*ID NAME is sent a moment after the call setup.  A Wait(1) or 
Wait(.5) as the first priority in the dialplan for incoming calls may 
make Asterisk receive the Caller*ID information.