Steve wrote: Speaking from T1 PRI and E1 PRI in West Africa, you tell the telco how many digits to send. Often times, at least in my experience, if not specified, they will only send the last four providing there are no conflicts.
They should be able to send however many digits you require, but maybe they wont. I have found that each telco, and in fact each CO, may have a different practice for how many digits they send. If you have a good sales person when you place the order you can specify, or at least they will provide that information. If you have an uninformed sales person, the engineer who sets up you circuit can usually provide that. If you end up with uninformed sales and engineering personnel, then it is time to test and debug. After dealing with telcos in China, Korea, Taiwan, Japan, India, Israel, Germany, The Netherlands and the USA, I have found *1* telco that provided all of the circuit details in advance without asking. Most will tell you they are using the standard values, but have no idea what those values are. Here is my check-list I ask for on new orders- Linecoding (If E1 I also ask if G.703 or not) Framing Switchtype Digits sent/outpulsed Digits expected (City or local code required?) Some telcos have been willing to change the number of digits sent, but I usually just rewrite the received number to prepend the missing digits. It is a little more work for me, but it reduces the chance that future maintenance by the telco will revert the circuit back to their normal values and bust inbound calls. Dan
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